The following changes since commit 6d9dd5fb9d0e9f4a174f53a0e20a39fbe809c71e: Merge remote-tracking branch 'remotes/armbru/tags/pull-qobject-2018-07-27-v2' into staging (2018-07-30 09:55:47 +0100) are available in the git repository at: git://repo.or.cz/qemu/kevin.git tags/for-upstream for you to fetch changes up to 1239ac241fe170bb9fcf0be74bfff04f6f1c2560: qemu-iotests: Test query-blockstats with -drive and -blockdev (2018-07-30 15:35:37 +0200) ---------------------------------------------------------------- Block layer patches: - qemu-img convert -C is now required to enable copy offloading - file-posix: Fix write_zeroes with unmap on block devices (would fall back to explicit writes on recent kernels) - Fix query-blockstats interface for use with -blockdev - Minor fixes and documentation updates ---------------------------------------------------------------- Fam Zheng (6): file-posix: Handle EINTR in preallocation=full write docs: Describe using images in writing iotests iotests: Don't lock /dev/null in 226 Revert "qemu-img: Document copy offloading implications with -S and -c" qemu-img: Add -C option for convert with copy offloading iotests: Add test for 'qemu-img convert -C' compatibility KONRAD Frederic (1): qcow: fix a reference leak Kevin Wolf (5): block: Fix documentation for BDRV_REQ_MAY_UNMAP file-posix: Fix write_zeroes with unmap on block devices block/qapi: Add 'qdev' field to query-blockstats result block/qapi: Include anonymous BBs in query-blockstats qemu-iotests: Test query-blockstats with -drive and -blockdev Leonid Bloch (1): qcow2: A grammar fix in conflicting cache sizing error message qapi/block-core.json | 14 +++- include/block/block.h | 11 +-- block/file-posix.c | 62 ++++++++++---- block/qapi.c | 16 +++- block/qcow.c | 1 + block/qcow2.c | 2 +- qemu-img.c | 21 ++++- docs/devel/testing.rst | 11 +++ qemu-img-cmds.hx | 2 +- qemu-img.texi | 14 ++-- tests/qemu-iotests/082 | 8 ++ tests/qemu-iotests/082.out | 11 +++ tests/qemu-iotests/103.out | 4 +- tests/qemu-iotests/137.out | 2 +- tests/qemu-iotests/226 | 4 +- tests/qemu-iotests/227 | 101 ++++++++++++++++++++++ tests/qemu-iotests/227.out | 205 +++++++++++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/group | 1 + 18 files changed, 449 insertions(+), 41 deletions(-) create mode 100755 tests/qemu-iotests/227 create mode 100644 tests/qemu-iotests/227.out From: KONRAD Frederic <frederic.konrad@adacore.com> Since 42a3e1ab367cdf38cce093de24eb406b99a4ef96 qemu asserts when using the vvfat driver: git clone git://qemu.org/qemu.git cd qemu ./configure --target-list=ppc-softmmu --enable-debug make -j8 mkdir foo touch foo/hello ./ppc-softmmu/qemu-system-ppc -M prep --nographic --monitor null \ -hda fat:rw:./foo "Ctrl-C" qemu-system-ppc: block.c:3368: bdrv_close_all: Assertion \ `((&all_bdrv_states)->tqh_first == ((void *)0))' failed. This is because we reference bs twice in qcow_co_create(..) one time in bdrv_open_blockdev_ref(..) and in blk_insert_bs(..) but we unref it only once in blk_unref which leads to the reference leak. Note that I didn't tested much QCOW after this change as I don't use it much. Signed-off-by: KONRAD Frederic <frederic.konrad@adacore.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/qcow.c | 1 + 1 file changed, 1 insertion(+) diff --git a/block/qcow.c b/block/qcow.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -XXX,XX +XXX,XX @@ static int coroutine_fn qcow_co_create(BlockdevCreateOptions *opts, ret = 0; exit: blk_unref(qcow_blk); + bdrv_unref(bs); qcrypto_block_free(crypto); return ret; } -- 2.13.6 From: Leonid Bloch <lbloch@janustech.com> Signed-off-by: Leonid Bloch <lbloch@janustech.com> Reviewed-by: John Snow <jsnow@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/qcow2.c | 2 +- tests/qemu-iotests/103.out | 4 ++-- tests/qemu-iotests/137.out | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-) diff --git a/block/qcow2.c b/block/qcow2.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -XXX,XX +XXX,XX @@ static void read_cache_sizes(BlockDriverState *bs, QemuOpts *opts, if (l2_cache_size_set && refcount_cache_size_set) { error_setg(errp, QCOW2_OPT_CACHE_SIZE ", " QCOW2_OPT_L2_CACHE_SIZE " and " QCOW2_OPT_REFCOUNT_CACHE_SIZE " may not be set " - "the same time"); + "at the same time"); return; } else if (*l2_cache_size > combined_cache_size) { error_setg(errp, QCOW2_OPT_L2_CACHE_SIZE " may not exceed " diff --git a/tests/qemu-iotests/103.out b/tests/qemu-iotests/103.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/103.out +++ b/tests/qemu-iotests/103.out @@ -XXX,XX +XXX,XX @@ wrote 65536/65536 bytes at offset 0 === Testing invalid option combinations === -can't open device TEST_DIR/t.IMGFMT: cache-size, l2-cache-size and refcount-cache-size may not be set the same time +can't open device TEST_DIR/t.IMGFMT: cache-size, l2-cache-size and refcount-cache-size may not be set at the same time can't open device TEST_DIR/t.IMGFMT: l2-cache-size may not exceed cache-size can't open device TEST_DIR/t.IMGFMT: refcount-cache-size may not exceed cache-size -can't open device TEST_DIR/t.IMGFMT: cache-size, l2-cache-size and refcount-cache-size may not be set the same time +can't open device TEST_DIR/t.IMGFMT: cache-size, l2-cache-size and refcount-cache-size may not be set at the same time can't open device TEST_DIR/t.IMGFMT: L2 cache entry size must be a power of two between 512 and the cluster size (65536) can't open device TEST_DIR/t.IMGFMT: L2 cache entry size must be a power of two between 512 and the cluster size (65536) can't open device TEST_DIR/t.IMGFMT: L2 cache entry size must be a power of two between 512 and the cluster size (65536) diff --git a/tests/qemu-iotests/137.out b/tests/qemu-iotests/137.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/137.out +++ b/tests/qemu-iotests/137.out @@ -XXX,XX +XXX,XX @@ read 33554432/33554432 bytes at offset 0 === Try setting some invalid values === Parameter 'lazy-refcounts' expects 'on' or 'off' -cache-size, l2-cache-size and refcount-cache-size may not be set the same time +cache-size, l2-cache-size and refcount-cache-size may not be set at the same time l2-cache-size may not exceed cache-size refcount-cache-size may not exceed cache-size L2 cache size too big -- 2.13.6 From: Fam Zheng <famz@redhat.com> Cc: qemu-stable@nongnu.org Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/file-posix.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/block/file-posix.c b/block/file-posix.c index XXXXXXX..XXXXXXX 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -XXX,XX +XXX,XX @@ static int handle_aiocb_truncate(RawPosixAIOData *aiocb) num = MIN(left, 65536); result = write(fd, buf, num); if (result < 0) { + if (errno == EINTR) { + continue; + } result = -errno; error_setg_errno(errp, -result, "Could not write zeros for preallocation"); -- 2.13.6 From: Fam Zheng <famz@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- docs/devel/testing.rst | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/docs/devel/testing.rst b/docs/devel/testing.rst index XXXXXXX..XXXXXXX 100644 --- a/docs/devel/testing.rst +++ b/docs/devel/testing.rst @@ -XXX,XX +XXX,XX @@ comparable library support for invoking and interacting with QEMU programs. If you opt for Python, it is strongly recommended to write Python 3 compatible code. +Both Python and Bash frameworks in iotests provide helpers to manage test +images. They can be used to create and clean up images under the test +directory. If no I/O or any protocol specific feature is needed, it is often +more convenient to use the pseudo block driver, ``null-co://``, as the test +image, which doesn't require image creation or cleaning up. Avoid system-wide +devices or files whenever possible, such as ``/dev/null`` or ``/dev/zero``. +Otherwise, image locking implications have to be considered. For example, +another application on the host may have locked the file, possibly leading to a +test failure. If using such devices are explicitly desired, consider adding +``locking=off`` option to disable image locking. + Docker based tests ================== -- 2.13.6 From: Fam Zheng <famz@redhat.com> On my system (Fedora 28), this script reports a 'failed to get "consistent read" lock' error. Following docs/devel/testing.rst, it's better to add locking=off here. Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/226 | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tests/qemu-iotests/226 b/tests/qemu-iotests/226 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/226 +++ b/tests/qemu-iotests/226 @@ -XXX,XX +XXX,XX @@ for PROTO in "file" "host_device" "host_cdrom"; do echo echo "== Testing RO ==" $QEMU_IO -c "open -r -o driver=$PROTO,filename=$TEST_IMG" 2>&1 | _filter_testdir | _filter_imgfmt - $QEMU_IO -c "open -r -o driver=$PROTO,filename=/dev/null" 2>&1 | _filter_imgfmt + $QEMU_IO -c "open -r -o driver=$PROTO,filename=/dev/null,locking=off" 2>&1 | _filter_imgfmt echo "== Testing RW ==" $QEMU_IO -c "open -o driver=$PROTO,filename=$TEST_IMG" 2>&1 | _filter_testdir | _filter_imgfmt - $QEMU_IO -c "open -o driver=$PROTO,filename=/dev/null" 2>&1 | _filter_imgfmt + $QEMU_IO -c "open -o driver=$PROTO,filename=/dev/null,locking=off" 2>&1 | _filter_imgfmt done # success, all done -- 2.13.6 From: Fam Zheng <famz@redhat.com> This reverts commit eb461485f4558e362fab905735b50987505bca44. Now that we introduce an explicit option, these implicit rules are not used. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- qemu-img.texi | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/qemu-img.texi b/qemu-img.texi index XXXXXXX..XXXXXXX 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -XXX,XX +XXX,XX @@ will enumerate information about backing files in a disk image chain. Refer below for further description. @item -c -indicates that target image must be compressed (qcow format only). If this -option is used, copy offloading will not be attempted. +indicates that target image must be compressed (qcow format only) @item -h with or without a command shows help and lists the supported formats @@ -XXX,XX +XXX,XX @@ in case both @var{-q} and @var{-p} options are used. indicates the consecutive number of bytes that must contain only zeros for qemu-img to create a sparse image during conversion. This value is rounded down to the nearest 512 bytes. You may use the common size suffixes like -@code{k} for kilobytes. If this option is used, copy offloading will not be -attempted. +@code{k} for kilobytes. @item -t @var{cache} specifies the cache mode that should be used with the (destination) file. See -- 2.13.6 From: Fam Zheng <famz@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- qemu-img.c | 21 +++++++++++++++++---- qemu-img-cmds.hx | 2 +- qemu-img.texi | 8 +++++++- 3 files changed, 25 insertions(+), 6 deletions(-) diff --git a/qemu-img.c b/qemu-img.c index XXXXXXX..XXXXXXX 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -XXX,XX +XXX,XX @@ static int img_convert(int argc, char **argv) skip_create = false, progress = false, tgt_image_opts = false; int64_t ret = -EINVAL; bool force_share = false; + bool explict_min_sparse = false; ImgConvertState s = (ImgConvertState) { /* Need at least 4k of zeros for sparse detection */ .min_sparse = 8, - .copy_range = true, + .copy_range = false, .buf_sectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE, .wr_in_order = true, .num_coroutines = 8, @@ -XXX,XX +XXX,XX @@ static int img_convert(int argc, char **argv) {"target-image-opts", no_argument, 0, OPTION_TARGET_IMAGE_OPTS}, {0, 0, 0, 0} }; - c = getopt_long(argc, argv, ":hf:O:B:co:l:S:pt:T:qnm:WU", + c = getopt_long(argc, argv, ":hf:O:B:Cco:l:S:pt:T:qnm:WU", long_options, NULL); if (c == -1) { break; @@ -XXX,XX +XXX,XX @@ static int img_convert(int argc, char **argv) case 'B': out_baseimg = optarg; break; + case 'C': + s.copy_range = true; + break; case 'c': s.compressed = true; - s.copy_range = false; break; case 'o': if (!is_valid_option_list(optarg)) { @@ -XXX,XX +XXX,XX @@ static int img_convert(int argc, char **argv) } s.min_sparse = sval / BDRV_SECTOR_SIZE; - s.copy_range = false; + explict_min_sparse = true; break; } case 'p': @@ -XXX,XX +XXX,XX @@ static int img_convert(int argc, char **argv) goto fail_getopt; } + if (s.compressed && s.copy_range) { + error_report("Cannot enable copy offloading when -c is used"); + goto fail_getopt; + } + + if (explict_min_sparse && s.copy_range) { + error_report("Cannot enable copy offloading when -S is used"); + goto fail_getopt; + } + if (tgt_image_opts && !skip_create) { error_report("--target-image-opts requires use of -n flag"); goto fail_getopt; diff --git a/qemu-img-cmds.hx b/qemu-img-cmds.hx index XXXXXXX..XXXXXXX 100644 --- a/qemu-img-cmds.hx +++ b/qemu-img-cmds.hx @@ -XXX,XX +XXX,XX @@ STEXI ETEXI DEF("convert", img_convert, - "convert [--object objectdef] [--image-opts] [--target-image-opts] [-U] [-c] [-p] [-q] [-n] [-f fmt] [-t cache] [-T src_cache] [-O output_fmt] [-B backing_file] [-o options] [-l snapshot_param] [-S sparse_size] [-m num_coroutines] [-W] filename [filename2 [...]] output_filename") + "convert [--object objectdef] [--image-opts] [--target-image-opts] [-U] [-C] [-c] [-p] [-q] [-n] [-f fmt] [-t cache] [-T src_cache] [-O output_fmt] [-B backing_file] [-o options] [-l snapshot_param] [-S sparse_size] [-m num_coroutines] [-W] filename [filename2 [...]] output_filename") STEXI @item convert [--object @var{objectdef}] [--image-opts] [--target-image-opts] [-U] [-c] [-p] [-q] [-n] [-f @var{fmt}] [-t @var{cache}] [-T @var{src_cache}] [-O @var{output_fmt}] [-B @var{backing_file}] [-o @var{options}] [-l @var{snapshot_param}] [-S @var{sparse_size}] [-m @var{num_coroutines}] [-W] @var{filename} [@var{filename2} [...]] @var{output_filename} ETEXI diff --git a/qemu-img.texi b/qemu-img.texi index XXXXXXX..XXXXXXX 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -XXX,XX +XXX,XX @@ Number of parallel coroutines for the convert process Allow out-of-order writes to the destination. This option improves performance, but is only recommended for preallocated devices like host devices or other raw block devices. +@item -C +Try to use copy offloading to move data from source image to target. This may +improve performance if the data is remote, such as with NFS or iSCSI backends, +but will not automatically sparsify zero sectors, and may result in a fully +allocated target image depending on the host support for getting allocation +information. @end table Parameters to dd subcommand: @@ -XXX,XX +XXX,XX @@ Error on reading data @end table -@item convert [--object @var{objectdef}] [--image-opts] [--target-image-opts] [-U] [-c] [-p] [-q] [-n] [-f @var{fmt}] [-t @var{cache}] [-T @var{src_cache}] [-O @var{output_fmt}] [-B @var{backing_file}] [-o @var{options}] [-l @var{snapshot_param}] [-S @var{sparse_size}] [-m @var{num_coroutines}] [-W] @var{filename} [@var{filename2} [...]] @var{output_filename} +@item convert [--object @var{objectdef}] [--image-opts] [--target-image-opts] [-U] [-C] [-c] [-p] [-q] [-n] [-f @var{fmt}] [-t @var{cache}] [-T @var{src_cache}] [-O @var{output_fmt}] [-B @var{backing_file}] [-o @var{options}] [-l @var{snapshot_param}] [-S @var{sparse_size}] [-m @var{num_coroutines}] [-W] @var{filename} [@var{filename2} [...]] @var{output_filename} Convert the disk image @var{filename} or a snapshot @var{snapshot_param} to disk image @var{output_filename} using format @var{output_fmt}. It can be optionally compressed (@code{-c} -- 2.13.6 From: Fam Zheng <famz@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/082 | 8 ++++++++ tests/qemu-iotests/082.out | 11 +++++++++++ 2 files changed, 19 insertions(+) diff --git a/tests/qemu-iotests/082 b/tests/qemu-iotests/082 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/082 +++ b/tests/qemu-iotests/082 @@ -XXX,XX +XXX,XX @@ run_qemu_img convert -o help run_qemu_img convert -O bochs -o help echo +echo === convert: -C and other options === + +# Adding the help option to a command without other -o options +run_qemu_img convert -C -S 4k -O $IMGFMT "$TEST_IMG" "$TEST_IMG".target +run_qemu_img convert -C -S 8k -O $IMGFMT "$TEST_IMG" "$TEST_IMG".target +run_qemu_img convert -C -c -O $IMGFMT "$TEST_IMG" "$TEST_IMG".target + +echo echo === amend: Options specified more than once === # Last -f should win diff --git a/tests/qemu-iotests/082.out b/tests/qemu-iotests/082.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/082.out +++ b/tests/qemu-iotests/082.out @@ -XXX,XX +XXX,XX @@ size Virtual disk size Testing: convert -O bochs -o help qemu-img: Format driver 'bochs' does not support image creation +=== convert: -C and other options === + +Testing: convert -C -S 4k -O qcow2 TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.target +qemu-img: Cannot enable copy offloading when -S is used + +Testing: convert -C -S 8k -O qcow2 TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.target +qemu-img: Cannot enable copy offloading when -S is used + +Testing: convert -C -c -O qcow2 TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.target +qemu-img: Cannot enable copy offloading when -c is used + === amend: Options specified more than once === Testing: amend -f foo -f qcow2 -o lazy_refcounts=on TEST_DIR/t.qcow2 -- 2.13.6 BDRV_REQ_MAY_UNMAP in a write_zeroes request does not only allow the driver to unmap the blocks, but it actively requests that the blocks be unmapped afterwards if at all possible. Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- include/block/block.h | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/include/block/block.h b/include/block/block.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -XXX,XX +XXX,XX @@ typedef struct BlockFragInfo { typedef enum { BDRV_REQ_COPY_ON_READ = 0x1, BDRV_REQ_ZERO_WRITE = 0x2, - /* The BDRV_REQ_MAY_UNMAP flag is used to indicate that the block driver - * is allowed to optimize a write zeroes request by unmapping (discarding) - * blocks if it is guaranteed that the result will read back as - * zeroes. The flag is only passed to the driver if the block device is - * opened with BDRV_O_UNMAP. + + /* + * The BDRV_REQ_MAY_UNMAP flag is used in write_zeroes requests to indicate + * that the block driver should unmap (discard) blocks if it is guaranteed + * that the result will read back as zeroes. The flag is only passed to the + * driver if the block device is opened with BDRV_O_UNMAP. */ BDRV_REQ_MAY_UNMAP = 0x4, -- 2.13.6 The BLKDISCARD ioctl doesn't guarantee that the discarded blocks read as all-zero afterwards, so don't try to abuse it for zero writing. We try to only use this if BLKDISCARDZEROES tells us that it is safe, but this is unreliable on older kernels and a constant 0 in newer kernels. In other words, this code path is never actually used with newer kernels, so we don't even try to unmap while writing zeros. This patch removes the abuse of discard for writing zeroes from file-posix and instead adds a new function that uses interfaces that are actually meant to deallocate and zero out at the same time. Only if those fail, it falls back to zeroing out without unmap. We never fall back to a discard operation any more that may or may not result in zeros. Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/file-posix.c | 59 ++++++++++++++++++++++++++++++++++++++++-------------- 1 file changed, 44 insertions(+), 15 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index XXXXXXX..XXXXXXX 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -XXX,XX +XXX,XX @@ static int raw_open_common(BlockDriverState *bs, QDict *options, } #endif - bs->supported_zero_flags = s->discard_zeroes ? BDRV_REQ_MAY_UNMAP : 0; + bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP; ret = 0; fail: if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) { @@ -XXX,XX +XXX,XX @@ static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb) return -ENOTSUP; } +static ssize_t handle_aiocb_write_zeroes_unmap(RawPosixAIOData *aiocb) +{ + BDRVRawState *s G_GNUC_UNUSED = aiocb->bs->opaque; + int ret; + + /* First try to write zeros and unmap at the same time */ + +#ifdef CONFIG_FALLOCATE_PUNCH_HOLE + ret = do_fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, + aiocb->aio_offset, aiocb->aio_nbytes); + if (ret != -ENOTSUP) { + return ret; + } +#endif + +#ifdef CONFIG_XFS + if (s->is_xfs) { + /* xfs_discard() guarantees that the discarded area reads as all-zero + * afterwards, so we can use it here. */ + return xfs_discard(s, aiocb->aio_offset, aiocb->aio_nbytes); + } +#endif + + /* If we couldn't manage to unmap while guaranteed that the area reads as + * all-zero afterwards, just write zeroes without unmapping */ + ret = handle_aiocb_write_zeroes(aiocb); + return ret; +} + #ifndef HAVE_COPY_FILE_RANGE static off_t copy_file_range(int in_fd, off_t *in_off, int out_fd, off_t *out_off, size_t len, unsigned int flags) @@ -XXX,XX +XXX,XX @@ static int aio_worker(void *arg) case QEMU_AIO_WRITE_ZEROES: ret = handle_aiocb_write_zeroes(aiocb); break; + case QEMU_AIO_WRITE_ZEROES | QEMU_AIO_DISCARD: + ret = handle_aiocb_write_zeroes_unmap(aiocb); + break; case QEMU_AIO_COPY_RANGE: ret = handle_aiocb_copy_range(aiocb); break; @@ -XXX,XX +XXX,XX @@ static int coroutine_fn raw_co_pwrite_zeroes( int bytes, BdrvRequestFlags flags) { BDRVRawState *s = bs->opaque; + int operation = QEMU_AIO_WRITE_ZEROES; - if (!(flags & BDRV_REQ_MAY_UNMAP)) { - return paio_submit_co(bs, s->fd, offset, NULL, bytes, - QEMU_AIO_WRITE_ZEROES); - } else if (s->discard_zeroes) { - return paio_submit_co(bs, s->fd, offset, NULL, bytes, - QEMU_AIO_DISCARD); + if (flags & BDRV_REQ_MAY_UNMAP) { + operation |= QEMU_AIO_DISCARD; } - return -ENOTSUP; + + return paio_submit_co(bs, s->fd, offset, NULL, bytes, operation); } static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) @@ -XXX,XX +XXX,XX @@ static coroutine_fn int hdev_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int bytes, BdrvRequestFlags flags) { BDRVRawState *s = bs->opaque; + int operation = QEMU_AIO_WRITE_ZEROES | QEMU_AIO_BLKDEV; int rc; rc = fd_open(bs); if (rc < 0) { return rc; } - if (!(flags & BDRV_REQ_MAY_UNMAP)) { - return paio_submit_co(bs, s->fd, offset, NULL, bytes, - QEMU_AIO_WRITE_ZEROES|QEMU_AIO_BLKDEV); - } else if (s->discard_zeroes) { - return paio_submit_co(bs, s->fd, offset, NULL, bytes, - QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV); + + if (flags & BDRV_REQ_MAY_UNMAP) { + operation |= QEMU_AIO_DISCARD; } - return -ENOTSUP; + + return paio_submit_co(bs, s->fd, offset, NULL, bytes, operation); } static int coroutine_fn hdev_co_create_opts(const char *filename, QemuOpts *opts, -- 2.13.6 Like for query-block, the client needs to identify which BlockBackend the returned data is for. Anonymous BlockBackends are identified by the device model they are attached to. Add a 'qdev' field that contains the qdev ID or QOM path of the attached device model. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- qapi/block-core.json | 14 ++++++++++---- block/qapi.c | 10 ++++++++++ 2 files changed, 20 insertions(+), 4 deletions(-) diff --git a/qapi/block-core.json b/qapi/block-core.json index XXXXXXX..XXXXXXX 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -XXX,XX +XXX,XX @@ # # @node-name: The node name of the device. (Since 2.3) # +# @qdev: The qdev ID, or if no ID is assigned, the QOM path of the block +# device. (since 3.0) +# # @stats: A @BlockDeviceStats for the device. # # @parent: This describes the file block device if it has one. @@ -XXX,XX +XXX,XX @@ # Since: 0.14.0 ## { 'struct': 'BlockStats', - 'data': {'*device': 'str', '*node-name': 'str', + 'data': {'*device': 'str', '*qdev': 'str', '*node-name': 'str', 'stats': 'BlockDeviceStats', '*parent': 'BlockStats', '*backing': 'BlockStats'} } @@ -XXX,XX +XXX,XX @@ # "idle_time_ns":2953431879, # "account_invalid":true, # "account_failed":false -# } +# }, +# "qdev": "/machine/unattached/device[23]" # }, # { # "device":"ide1-cd0", @@ -XXX,XX +XXX,XX @@ # "wr_merged":0, # "account_invalid":false, # "account_failed":false -# } +# }, +# "qdev": "/machine/unattached/device[24]" # }, # { # "device":"floppy0", @@ -XXX,XX +XXX,XX @@ # "wr_merged":0, # "account_invalid":false, # "account_failed":false -# } +# }, +# "qdev": "/machine/unattached/device[16]" # }, # { # "device":"sd0", diff --git a/block/qapi.c b/block/qapi.c index XXXXXXX..XXXXXXX 100644 --- a/block/qapi.c +++ b/block/qapi.c @@ -XXX,XX +XXX,XX @@ BlockStatsList *qmp_query_blockstats(bool has_query_nodes, BlockStatsList *info = g_malloc0(sizeof(*info)); AioContext *ctx = blk_get_aio_context(blk); BlockStats *s; + char *qdev; aio_context_acquire(ctx); s = bdrv_query_bds_stats(blk_bs(blk), true); s->has_device = true; s->device = g_strdup(blk_name(blk)); + + qdev = blk_get_attached_dev_id(blk); + if (qdev && *qdev) { + s->has_qdev = true; + s->qdev = qdev; + } else { + g_free(qdev); + } + bdrv_query_blk_stats(s->stats, blk); aio_context_release(ctx); -- 2.13.6 Consistent with query-block, query-blockstats should not only include named BlockBackends, but also those that are anonymous, but belong to a device model. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- block/qapi.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/block/qapi.c b/block/qapi.c index XXXXXXX..XXXXXXX 100644 --- a/block/qapi.c +++ b/block/qapi.c @@ -XXX,XX +XXX,XX @@ BlockStatsList *qmp_query_blockstats(bool has_query_nodes, p_next = &info->next; } } else { - for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { + for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) { BlockStatsList *info = g_malloc0(sizeof(*info)); AioContext *ctx = blk_get_aio_context(blk); BlockStats *s; char *qdev; + if (!*blk_name(blk) && !blk_get_attached_dev(blk)) { + continue; + } + aio_context_acquire(ctx); s = bdrv_query_bds_stats(blk_bs(blk), true); s->has_device = true; -- 2.13.6 Make sure that query-blockstats returns information for every BlockBackend that is named or attached to a device model (or both). Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/227 | 101 ++++++++++++++++++++++ tests/qemu-iotests/227.out | 205 +++++++++++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/group | 1 + 3 files changed, 307 insertions(+) create mode 100755 tests/qemu-iotests/227 create mode 100644 tests/qemu-iotests/227.out diff --git a/tests/qemu-iotests/227 b/tests/qemu-iotests/227 new file mode 100755 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/227 @@ -XXX,XX +XXX,XX @@ +#!/bin/bash +# +# Test query-blockstats with different ways to create a BB +# +# Copyright (C) 2018 Red Hat, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +# creator +owner=kwolf@redhat.com + +seq=$(basename $0) +echo "QA output created by $seq" + +here=$PWD +status=1 # failure is the default! + +_cleanup() +{ + _cleanup_test_img +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +_supported_fmt generic +_supported_proto file +_supported_os Linux + +function do_run_qemu() +{ + echo Testing: "$@" + $QEMU -nographic -qmp-pretty stdio -serial none "$@" + echo +} + +function run_qemu() +{ + do_run_qemu "$@" 2>&1 | _filter_testdir | _filter_qmp \ + | _filter_qemu | _filter_imgfmt \ + | _filter_generated_node_ids +} + +echo +echo '=== blockstats with -drive if=virtio ===' +echo + +run_qemu -drive driver=null-co,if=virtio <<EOF +{ "execute": "qmp_capabilities" } +{ "execute": "query-blockstats"} +{ "execute": "quit" } +EOF + +echo +echo '=== blockstats with -drive if=none ===' +echo + +run_qemu -drive driver=null-co,if=none <<EOF +{ "execute": "qmp_capabilities" } +{ "execute": "query-blockstats"} +{ "execute": "quit" } +EOF + +echo +echo '=== blockstats with -blockdev ===' +echo + +run_qemu -blockdev driver=null-co,node-name=null <<EOF +{ "execute": "qmp_capabilities" } +{ "execute": "query-blockstats"} +{ "execute": "quit" } +EOF + +echo +echo '=== blockstats with -blockdev and -device ===' +echo + +run_qemu -blockdev driver=null-co,node-name=null -device virtio-blk,drive=null,id=virtio0 <<EOF +{ "execute": "qmp_capabilities" } +{ "execute": "query-blockstats"} +{ "execute": "quit" } +EOF + +# success, all done +echo "*** done" +rm -f $seq.full +status=0 diff --git a/tests/qemu-iotests/227.out b/tests/qemu-iotests/227.out new file mode 100644 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/227.out @@ -XXX,XX +XXX,XX @@ +QA output created by 227 + +=== blockstats with -drive if=virtio === + +Testing: -drive driver=null-co,if=virtio +{ + QMP_VERSION +} +{ + "return": { + } +} +{ + "return": [ + { + "device": "virtio0", + "stats": { + "flush_total_time_ns": 0, + "wr_highest_offset": 0, + "wr_total_time_ns": 0, + "failed_wr_operations": 0, + "failed_rd_operations": 0, + "wr_merged": 0, + "wr_bytes": 0, + "timed_stats": [ + ], + "failed_flush_operations": 0, + "account_invalid": true, + "rd_total_time_ns": 0, + "flush_operations": 0, + "wr_operations": 0, + "rd_merged": 0, + "rd_bytes": 0, + "invalid_flush_operations": 0, + "account_failed": true, + "rd_operations": 0, + "invalid_wr_operations": 0, + "invalid_rd_operations": 0 + }, + "node-name": "NODE_NAME", + "qdev": "/machine/peripheral-anon/device[0]/virtio-backend" + } + ] +} +{ + "return": { + } +} +{ + "timestamp": { + "seconds": TIMESTAMP, + "microseconds": TIMESTAMP + }, + "event": "SHUTDOWN", + "data": { + "guest": false + } +} + + +=== blockstats with -drive if=none === + +Testing: -drive driver=null-co,if=none +{ + QMP_VERSION +} +{ + "return": { + } +} +{ + "return": [ + { + "device": "none0", + "stats": { + "flush_total_time_ns": 0, + "wr_highest_offset": 0, + "wr_total_time_ns": 0, + "failed_wr_operations": 0, + "failed_rd_operations": 0, + "wr_merged": 0, + "wr_bytes": 0, + "timed_stats": [ + ], + "failed_flush_operations": 0, + "account_invalid": true, + "rd_total_time_ns": 0, + "flush_operations": 0, + "wr_operations": 0, + "rd_merged": 0, + "rd_bytes": 0, + "invalid_flush_operations": 0, + "account_failed": true, + "rd_operations": 0, + "invalid_wr_operations": 0, + "invalid_rd_operations": 0 + }, + "node-name": "NODE_NAME" + } + ] +} +{ + "return": { + } +} +{ + "timestamp": { + "seconds": TIMESTAMP, + "microseconds": TIMESTAMP + }, + "event": "SHUTDOWN", + "data": { + "guest": false + } +} + + +=== blockstats with -blockdev === + +Testing: -blockdev driver=null-co,node-name=null +{ + QMP_VERSION +} +{ + "return": { + } +} +{ + "return": [ + ] +} +{ + "return": { + } +} +{ + "timestamp": { + "seconds": TIMESTAMP, + "microseconds": TIMESTAMP + }, + "event": "SHUTDOWN", + "data": { + "guest": false + } +} + + +=== blockstats with -blockdev and -device === + +Testing: -blockdev driver=null-co,node-name=null -device virtio-blk,drive=null,id=virtio0 +{ + QMP_VERSION +} +{ + "return": { + } +} +{ + "return": [ + { + "device": "", + "stats": { + "flush_total_time_ns": 0, + "wr_highest_offset": 0, + "wr_total_time_ns": 0, + "failed_wr_operations": 0, + "failed_rd_operations": 0, + "wr_merged": 0, + "wr_bytes": 0, + "timed_stats": [ + ], + "failed_flush_operations": 0, + "account_invalid": false, + "rd_total_time_ns": 0, + "flush_operations": 0, + "wr_operations": 0, + "rd_merged": 0, + "rd_bytes": 0, + "invalid_flush_operations": 0, + "account_failed": false, + "rd_operations": 0, + "invalid_wr_operations": 0, + "invalid_rd_operations": 0 + }, + "node-name": "null", + "qdev": "/machine/peripheral/virtio0/virtio-backend" + } + ] +} +{ + "return": { + } +} +{ + "timestamp": { + "seconds": TIMESTAMP, + "microseconds": TIMESTAMP + }, + "event": "SHUTDOWN", + "data": { + "guest": false + } +} + +*** done diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -XXX,XX +XXX,XX @@ 223 rw auto quick 225 rw auto quick 226 auto quick +227 auto quick -- 2.13.6 The following changes since commit b2f7a038bb4c4fc5ce6b8486e8513dfd97665e2a: Merge remote-tracking branch 'remotes/rth/tags/pull-softfloat-20181104' into staging (2018-11-05 10:32:49 +0000) are available in the Git repository at: git://repo.or.cz/qemu/kevin.git tags/for-upstream for you to fetch changes up to 1240ac558d348f6c7a5752b1a57c1da58e4efe3e: include: Add a comment to explain the origin of sizes' lookup table (2018-11-05 15:29:59 +0100) ---------------------------------------------------------------- Block layer patches: - auto-read-only option to fix commit job when used with -blockdev - Fix help text related qemu-iotests failure (by improving the help text and updating the reference output) - quorum: Add missing checks when adding/removing child nodes - Don't take address of fields in packed structs - vvfat: Fix crash when reporting error about too many files in directory ---------------------------------------------------------------- Alberto Garcia (7): block: replace "discard" literal with BDRV_OPT_DISCARD macro qcow2: Get the request alignment for encrypted images from QCryptoBlock quorum: Remove quorum_err() quorum: Return an error if the blkverify mode has invalid settings iotest: Test the blkverify mode of the Quorum driver quorum: Forbid adding children in blkverify mode iotest: Test x-blockdev-change on a Quorum Cleber Rosa (1): iotests: make 083 specific to raw Daniel P. Berrangé (1): crypto: initialize sector size even when opening with no IO flag Kevin Wolf (12): vpc: Don't leak opts in vpc_open() block: Update flags in bdrv_set_read_only() block: Add auto-read-only option rbd: Close image in qemu_rbd_open() error path block: Require auto-read-only for existing fallbacks nbd: Support auto-read-only option file-posix: Support auto-read-only option curl: Support auto-read-only option gluster: Support auto-read-only option iscsi: Support auto-read-only option block: Make auto-read-only=on default for -drive qemu-iotests: Test auto-read-only with -drive and -blockdev Leonid Bloch (2): vdi: Use a literal number of bytes for DEFAULT_CLUSTER_SIZE include: Add a comment to explain the origin of sizes' lookup table Li Qiang (1): block: change some function return type to bool Max Reitz (5): option: Make option help nicer to read chardev: Indent list of chardevs qdev-monitor: Make device options help nicer object: Make option help nicer to read fw_cfg: Drop newline in @file description Peter Maydell (5): block/qcow2: Don't take address of fields in packed structs block/qcow: Don't take address of fields in packed structs block/qcow2-bitmap: Don't take address of fields in packed structs block/vhdx: Don't take address of fields in packed structs block/vdi: Don't take address of fields in packed structs Stefan Weil (1): qemu-io-cmds: Fix two format strings Thomas Huth (1): block/vvfat: Fix crash when reporting error about too many files in directory qapi/block-core.json | 7 + block/vhdx.h | 12 +- include/block/block.h | 5 +- include/qemu/option.h | 2 +- include/qemu/units.h | 18 + include/sysemu/block-backend.h | 6 +- block.c | 60 ++- block/block-backend.c | 8 +- block/bochs.c | 17 +- block/cloop.c | 16 +- block/curl.c | 8 +- block/dmg.c | 16 +- block/file-posix.c | 19 +- block/gluster.c | 12 +- block/iscsi.c | 8 +- block/nbd-client.c | 10 +- block/qcow.c | 18 +- block/qcow2-bitmap.c | 24 +- block/qcow2.c | 66 +-- block/quorum.c | 45 +- block/rbd.c | 14 +- block/vdi.c | 68 +-- block/vhdx-endian.c | 118 ++--- block/vhdx-log.c | 4 +- block/vhdx.c | 18 +- block/vpc.c | 2 + block/vvfat.c | 15 +- blockdev.c | 3 +- chardev/char.c | 2 +- crypto/block-qcow.c | 2 + qdev-monitor.c | 13 +- qemu-img.c | 4 +- qemu-io-cmds.c | 4 +- util/qemu-option.c | 32 +- vl.c | 15 +- tests/qemu-iotests/081 | 116 +++++ tests/qemu-iotests/081.out | 70 +++ tests/qemu-iotests/082.out | 956 ++++++++++++++++++++--------------------- tests/qemu-iotests/083 | 2 +- tests/qemu-iotests/232 | 147 +++++++ tests/qemu-iotests/232.out | 59 +++ tests/qemu-iotests/group | 1 + 42 files changed, 1266 insertions(+), 776 deletions(-) create mode 100755 tests/qemu-iotests/232 create mode 100644 tests/qemu-iotests/232.out From: Thomas Huth <thuth@redhat.com> When using the vvfat driver with a directory that contains too many files, QEMU currently crashes. This can be triggered like this for example: mkdir /tmp/vvfattest cd /tmp/vvfattest for ((x=0;x<=513;x++)); do mkdir $x; done qemu-system-x86_64 -drive \ file.driver=vvfat,file.dir=.,read-only=on,media=cdrom Seems like read_directory() is changing the mapping->path variable. Make sure we use the right pointer instead. Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/vvfat.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/block/vvfat.c b/block/vvfat.c index XXXXXXX..XXXXXXX 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -XXX,XX +XXX,XX @@ static int init_directories(BDRVVVFATState* s, mapping = array_get(&(s->mapping), i); if (mapping->mode & MODE_DIRECTORY) { + char *path = mapping->path; mapping->begin = cluster; if(read_directory(s, i)) { - error_setg(errp, "Could not read directory %s", - mapping->path); + error_setg(errp, "Could not read directory %s", path); return -1; } mapping = array_get(&(s->mapping), i); -- 2.19.1 From: Alberto Garcia <berto@igalia.com> Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/block.c b/block.c index XXXXXXX..XXXXXXX 100644 --- a/block.c +++ b/block.c @@ -XXX,XX +XXX,XX @@ QemuOptsList bdrv_runtime_opts = { .help = "try to optimize zero writes (off, on, unmap)", }, { - .name = "discard", + .name = BDRV_OPT_DISCARD, .type = QEMU_OPT_STRING, .help = "discard operation (ignore/off, unmap/on)", }, @@ -XXX,XX +XXX,XX @@ static int bdrv_open_common(BlockDriverState *bs, BlockBackend *file, } } - discard = qemu_opt_get(opts, "discard"); + discard = qemu_opt_get(opts, BDRV_OPT_DISCARD); if (discard != NULL) { if (bdrv_parse_discard_flags(discard, &bs->open_flags) != 0) { error_setg(errp, "Invalid discard option"); @@ -XXX,XX +XXX,XX @@ int bdrv_reopen_prepare(BDRVReopenState *reopen_state, BlockReopenQueue *queue, update_flags_from_options(&reopen_state->flags, opts); - discard = qemu_opt_get_del(opts, "discard"); + discard = qemu_opt_get_del(opts, BDRV_OPT_DISCARD); if (discard != NULL) { if (bdrv_parse_discard_flags(discard, &reopen_state->flags) != 0) { error_setg(errp, "Invalid discard option"); -- 2.19.1 From: Stefan Weil <sw@weilnetz.de> Use %zu instead of %zd for unsigned numbers. This fixes two error messages from the LSTM static code analyzer: This argument should be of type 'ssize_t' but is of type 'unsigned long' Signed-off-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- qemu-io-cmds.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c index XXXXXXX..XXXXXXX 100644 --- a/qemu-io-cmds.c +++ b/qemu-io-cmds.c @@ -XXX,XX +XXX,XX @@ static int readv_f(BlockBackend *blk, int argc, char **argv) memset(cmp_buf, pattern, qiov.size); if (memcmp(buf, cmp_buf, qiov.size)) { printf("Pattern verification failed at offset %" - PRId64 ", %zd bytes\n", offset, qiov.size); + PRId64 ", %zu bytes\n", offset, qiov.size); ret = -EINVAL; } g_free(cmp_buf); @@ -XXX,XX +XXX,XX @@ static void aio_read_done(void *opaque, int ret) memset(cmp_buf, ctx->pattern, ctx->qiov.size); if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) { printf("Pattern verification failed at offset %" - PRId64 ", %zd bytes\n", ctx->offset, ctx->qiov.size); + PRId64 ", %zu bytes\n", ctx->offset, ctx->qiov.size); } g_free(cmp_buf); } -- 2.19.1 From: Peter Maydell <peter.maydell@linaro.org> Taking the address of a field in a packed struct is a bad idea, because it might not be actually aligned enough for that pointer type (and thus cause a crash on dereference on some host architectures). Newer versions of clang warn about this. Avoid the bug by not using the "modify in place" byte swapping functions. There are a few places where the in-place swap function is used on something other than a packed struct field; we convert those anyway, for consistency. This patch was produced with the following spatch script (and hand-editing to fold a few resulting overlength lines): @@ expression E; @@ -be16_to_cpus(&E); +E = be16_to_cpu(E); @@ expression E; @@ -be32_to_cpus(&E); +E = be32_to_cpu(E); @@ expression E; @@ -be64_to_cpus(&E); +E = be64_to_cpu(E); @@ expression E; @@ -cpu_to_be16s(&E); +E = cpu_to_be16(E); @@ expression E; @@ -cpu_to_be32s(&E); +E = cpu_to_be32(E); @@ expression E; @@ -cpu_to_be64s(&E); +E = cpu_to_be64(E); Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Tested-by: John Snow <jsnow@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/qcow2.c | 64 +++++++++++++++++++++++++++------------------------ 1 file changed, 34 insertions(+), 30 deletions(-) diff --git a/block/qcow2.c b/block/qcow2.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -XXX,XX +XXX,XX @@ static int qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset, "pread fail from offset %" PRIu64, offset); return 1; } - be32_to_cpus(&ext.magic); - be32_to_cpus(&ext.len); + ext.magic = be32_to_cpu(ext.magic); + ext.len = be32_to_cpu(ext.len); offset += sizeof(ext); #ifdef DEBUG_EXT printf("ext.magic = 0x%x\n", ext.magic); @@ -XXX,XX +XXX,XX @@ static int qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset, "Unable to read CRYPTO header extension"); return ret; } - be64_to_cpus(&s->crypto_header.offset); - be64_to_cpus(&s->crypto_header.length); + s->crypto_header.offset = be64_to_cpu(s->crypto_header.offset); + s->crypto_header.length = be64_to_cpu(s->crypto_header.length); if ((s->crypto_header.offset % s->cluster_size) != 0) { error_setg(errp, "Encryption header offset '%" PRIu64 "' is " @@ -XXX,XX +XXX,XX @@ static int qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset, return -EINVAL; } - be32_to_cpus(&bitmaps_ext.nb_bitmaps); - be64_to_cpus(&bitmaps_ext.bitmap_directory_size); - be64_to_cpus(&bitmaps_ext.bitmap_directory_offset); + bitmaps_ext.nb_bitmaps = be32_to_cpu(bitmaps_ext.nb_bitmaps); + bitmaps_ext.bitmap_directory_size = + be64_to_cpu(bitmaps_ext.bitmap_directory_size); + bitmaps_ext.bitmap_directory_offset = + be64_to_cpu(bitmaps_ext.bitmap_directory_offset); if (bitmaps_ext.nb_bitmaps > QCOW2_MAX_BITMAPS) { error_setg(errp, @@ -XXX,XX +XXX,XX @@ static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options, error_setg_errno(errp, -ret, "Could not read qcow2 header"); goto fail; } - be32_to_cpus(&header.magic); - be32_to_cpus(&header.version); - be64_to_cpus(&header.backing_file_offset); - be32_to_cpus(&header.backing_file_size); - be64_to_cpus(&header.size); - be32_to_cpus(&header.cluster_bits); - be32_to_cpus(&header.crypt_method); - be64_to_cpus(&header.l1_table_offset); - be32_to_cpus(&header.l1_size); - be64_to_cpus(&header.refcount_table_offset); - be32_to_cpus(&header.refcount_table_clusters); - be64_to_cpus(&header.snapshots_offset); - be32_to_cpus(&header.nb_snapshots); + header.magic = be32_to_cpu(header.magic); + header.version = be32_to_cpu(header.version); + header.backing_file_offset = be64_to_cpu(header.backing_file_offset); + header.backing_file_size = be32_to_cpu(header.backing_file_size); + header.size = be64_to_cpu(header.size); + header.cluster_bits = be32_to_cpu(header.cluster_bits); + header.crypt_method = be32_to_cpu(header.crypt_method); + header.l1_table_offset = be64_to_cpu(header.l1_table_offset); + header.l1_size = be32_to_cpu(header.l1_size); + header.refcount_table_offset = be64_to_cpu(header.refcount_table_offset); + header.refcount_table_clusters = + be32_to_cpu(header.refcount_table_clusters); + header.snapshots_offset = be64_to_cpu(header.snapshots_offset); + header.nb_snapshots = be32_to_cpu(header.nb_snapshots); if (header.magic != QCOW_MAGIC) { error_setg(errp, "Image is not in qcow2 format"); @@ -XXX,XX +XXX,XX @@ static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options, header.refcount_order = 4; header.header_length = 72; } else { - be64_to_cpus(&header.incompatible_features); - be64_to_cpus(&header.compatible_features); - be64_to_cpus(&header.autoclear_features); - be32_to_cpus(&header.refcount_order); - be32_to_cpus(&header.header_length); + header.incompatible_features = + be64_to_cpu(header.incompatible_features); + header.compatible_features = be64_to_cpu(header.compatible_features); + header.autoclear_features = be64_to_cpu(header.autoclear_features); + header.refcount_order = be32_to_cpu(header.refcount_order); + header.header_length = be32_to_cpu(header.header_length); if (header.header_length < 104) { error_setg(errp, "qcow2 header too short"); @@ -XXX,XX +XXX,XX @@ static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options, goto fail; } for(i = 0;i < s->l1_size; i++) { - be64_to_cpus(&s->l1_table[i]); + s->l1_table[i] = be64_to_cpu(s->l1_table[i]); } } @@ -XXX,XX +XXX,XX @@ int qcow2_update_header(BlockDriverState *bs) /* Full disk encryption header pointer extension */ if (s->crypto_header.offset != 0) { - cpu_to_be64s(&s->crypto_header.offset); - cpu_to_be64s(&s->crypto_header.length); + s->crypto_header.offset = cpu_to_be64(s->crypto_header.offset); + s->crypto_header.length = cpu_to_be64(s->crypto_header.length); ret = header_ext_add(buf, QCOW2_EXT_MAGIC_CRYPTO_HEADER, &s->crypto_header, sizeof(s->crypto_header), buflen); - be64_to_cpus(&s->crypto_header.offset); - be64_to_cpus(&s->crypto_header.length); + s->crypto_header.offset = be64_to_cpu(s->crypto_header.offset); + s->crypto_header.length = be64_to_cpu(s->crypto_header.length); if (ret < 0) { goto fail; } -- 2.19.1 From: Peter Maydell <peter.maydell@linaro.org> Taking the address of a field in a packed struct is a bad idea, because it might not be actually aligned enough for that pointer type (and thus cause a crash on dereference on some host architectures). Newer versions of clang warn about this. Avoid the bug by not using the "modify in place" byte swapping functions. There are a few places where the in-place swap function is used on something other than a packed struct field; we convert those anyway, for consistency. This patch was produced with the following spatch script: @@ expression E; @@ -be16_to_cpus(&E); +E = be16_to_cpu(E); @@ expression E; @@ -be32_to_cpus(&E); +E = be32_to_cpu(E); @@ expression E; @@ -be64_to_cpus(&E); +E = be64_to_cpu(E); @@ expression E; @@ -cpu_to_be16s(&E); +E = cpu_to_be16(E); @@ expression E; @@ -cpu_to_be32s(&E); +E = cpu_to_be32(E); @@ expression E; @@ -cpu_to_be64s(&E); +E = cpu_to_be64(E); Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Tested-by: John Snow <jsnow@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/qcow.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/block/qcow.c b/block/qcow.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -XXX,XX +XXX,XX @@ static int qcow_open(BlockDriverState *bs, QDict *options, int flags, if (ret < 0) { goto fail; } - be32_to_cpus(&header.magic); - be32_to_cpus(&header.version); - be64_to_cpus(&header.backing_file_offset); - be32_to_cpus(&header.backing_file_size); - be32_to_cpus(&header.mtime); - be64_to_cpus(&header.size); - be32_to_cpus(&header.crypt_method); - be64_to_cpus(&header.l1_table_offset); + header.magic = be32_to_cpu(header.magic); + header.version = be32_to_cpu(header.version); + header.backing_file_offset = be64_to_cpu(header.backing_file_offset); + header.backing_file_size = be32_to_cpu(header.backing_file_size); + header.mtime = be32_to_cpu(header.mtime); + header.size = be64_to_cpu(header.size); + header.crypt_method = be32_to_cpu(header.crypt_method); + header.l1_table_offset = be64_to_cpu(header.l1_table_offset); if (header.magic != QCOW_MAGIC) { error_setg(errp, "Image not in qcow format"); @@ -XXX,XX +XXX,XX @@ static int qcow_open(BlockDriverState *bs, QDict *options, int flags, } for(i = 0;i < s->l1_size; i++) { - be64_to_cpus(&s->l1_table[i]); + s->l1_table[i] = be64_to_cpu(s->l1_table[i]); } /* alloc L2 cache (max. 64k * 16 * 8 = 8 MB) */ -- 2.19.1 From: Peter Maydell <peter.maydell@linaro.org> Taking the address of a field in a packed struct is a bad idea, because it might not be actually aligned enough for that pointer type (and thus cause a crash on dereference on some host architectures). Newer versions of clang warn about this. Avoid the bug by not using the "modify in place" byte swapping functions. There are a few places where the in-place swap function is used on something other than a packed struct field; we convert those anyway, for consistency. This patch was produced with the following spatch script: @@ expression E; @@ -be16_to_cpus(&E); +E = be16_to_cpu(E); @@ expression E; @@ -be32_to_cpus(&E); +E = be32_to_cpu(E); @@ expression E; @@ -be64_to_cpus(&E); +E = be64_to_cpu(E); @@ expression E; @@ -cpu_to_be16s(&E); +E = cpu_to_be16(E); @@ expression E; @@ -cpu_to_be32s(&E); +E = cpu_to_be32(E); @@ expression E; @@ -cpu_to_be64s(&E); +E = cpu_to_be64(E); Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Tested-by: John Snow <jsnow@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/qcow2-bitmap.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2-bitmap.c +++ b/block/qcow2-bitmap.c @@ -XXX,XX +XXX,XX @@ static inline void bitmap_table_to_be(uint64_t *bitmap_table, size_t size) size_t i; for (i = 0; i < size; ++i) { - cpu_to_be64s(&bitmap_table[i]); + bitmap_table[i] = cpu_to_be64(bitmap_table[i]); } } @@ -XXX,XX +XXX,XX @@ static int bitmap_table_load(BlockDriverState *bs, Qcow2BitmapTable *tb, } for (i = 0; i < tb->size; ++i) { - be64_to_cpus(&table[i]); + table[i] = be64_to_cpu(table[i]); ret = check_table_entry(table[i], s->cluster_size); if (ret < 0) { goto fail; @@ -XXX,XX +XXX,XX @@ fail: static inline void bitmap_dir_entry_to_cpu(Qcow2BitmapDirEntry *entry) { - be64_to_cpus(&entry->bitmap_table_offset); - be32_to_cpus(&entry->bitmap_table_size); - be32_to_cpus(&entry->flags); - be16_to_cpus(&entry->name_size); - be32_to_cpus(&entry->extra_data_size); + entry->bitmap_table_offset = be64_to_cpu(entry->bitmap_table_offset); + entry->bitmap_table_size = be32_to_cpu(entry->bitmap_table_size); + entry->flags = be32_to_cpu(entry->flags); + entry->name_size = be16_to_cpu(entry->name_size); + entry->extra_data_size = be32_to_cpu(entry->extra_data_size); } static inline void bitmap_dir_entry_to_be(Qcow2BitmapDirEntry *entry) { - cpu_to_be64s(&entry->bitmap_table_offset); - cpu_to_be32s(&entry->bitmap_table_size); - cpu_to_be32s(&entry->flags); - cpu_to_be16s(&entry->name_size); - cpu_to_be32s(&entry->extra_data_size); + entry->bitmap_table_offset = cpu_to_be64(entry->bitmap_table_offset); + entry->bitmap_table_size = cpu_to_be32(entry->bitmap_table_size); + entry->flags = cpu_to_be32(entry->flags); + entry->name_size = cpu_to_be16(entry->name_size); + entry->extra_data_size = cpu_to_be32(entry->extra_data_size); } static inline int calc_dir_entry_size(size_t name_size, size_t extra_data_size) -- 2.19.1 From: Daniel P. Berrangé <berrange@redhat.com> The qcow2 block driver expects to see a valid sector size even when it has opened the crypto layer with QCRYPTO_BLOCK_OPEN_NO_IO. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- crypto/block-qcow.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/crypto/block-qcow.c b/crypto/block-qcow.c index XXXXXXX..XXXXXXX 100644 --- a/crypto/block-qcow.c +++ b/crypto/block-qcow.c @@ -XXX,XX +XXX,XX @@ qcrypto_block_qcow_open(QCryptoBlock *block, Error **errp) { if (flags & QCRYPTO_BLOCK_OPEN_NO_IO) { + block->sector_size = QCRYPTO_BLOCK_QCOW_SECTOR_SIZE; + block->payload_offset = 0; return 0; } else { if (!options->u.qcow.key_secret) { -- 2.19.1 From: Alberto Garcia <berto@igalia.com> This doesn't have any practical effect at the moment because the values of BDRV_SECTOR_SIZE, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE and QCRYPTO_BLOCK_QCOW_SECTOR_SIZE are all the same (512 bytes), but future encryption methods could have different requirements. Signed-off-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/qcow2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/qcow2.c b/block/qcow2.c index XXXXXXX..XXXXXXX 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -XXX,XX +XXX,XX @@ static void qcow2_refresh_limits(BlockDriverState *bs, Error **errp) if (bs->encrypted) { /* Encryption works on a sector granularity */ - bs->bl.request_alignment = BDRV_SECTOR_SIZE; + bs->bl.request_alignment = qcrypto_block_get_sector_size(s->crypto); } bs->bl.pwrite_zeroes_alignment = s->cluster_size; bs->bl.pdiscard_alignment = s->cluster_size; -- 2.19.1 From: Li Qiang <liq3ea@163.com> Signed-off-by: Li Qiang <liq3ea@163.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- include/sysemu/block-backend.h | 6 +++--- block/block-backend.c | 8 ++++---- 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index XXXXXXX..XXXXXXX 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -XXX,XX +XXX,XX @@ BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read, int error); void blk_error_action(BlockBackend *blk, BlockErrorAction action, bool is_read, int error); -int blk_is_read_only(BlockBackend *blk); -int blk_is_sg(BlockBackend *blk); -int blk_enable_write_cache(BlockBackend *blk); +bool blk_is_read_only(BlockBackend *blk); +bool blk_is_sg(BlockBackend *blk); +bool blk_enable_write_cache(BlockBackend *blk); void blk_set_enable_write_cache(BlockBackend *blk, bool wce); void blk_invalidate_cache(BlockBackend *blk, Error **errp); bool blk_is_inserted(BlockBackend *blk); diff --git a/block/block-backend.c b/block/block-backend.c index XXXXXXX..XXXXXXX 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -XXX,XX +XXX,XX @@ void blk_error_action(BlockBackend *blk, BlockErrorAction action, } } -int blk_is_read_only(BlockBackend *blk) +bool blk_is_read_only(BlockBackend *blk) { BlockDriverState *bs = blk_bs(blk); @@ -XXX,XX +XXX,XX @@ int blk_is_read_only(BlockBackend *blk) } } -int blk_is_sg(BlockBackend *blk) +bool blk_is_sg(BlockBackend *blk) { BlockDriverState *bs = blk_bs(blk); if (!bs) { - return 0; + return false; } return bdrv_is_sg(bs); } -int blk_enable_write_cache(BlockBackend *blk) +bool blk_enable_write_cache(BlockBackend *blk) { return blk->enable_write_cache; } -- 2.19.1 From: Cleber Rosa <crosa@redhat.com> While testing the Python 3 changes which touch the 083 test, I noticed that it would fail with qcow2. Expanding the testing, I noticed it had nothing to do with the Python 3 changes, and in fact, it would not pass on anything but raw: raw: pass bochs: not generic cloop: not generic parallels: fail qcow: fail qcow2: fail qed: fail vdi: fail vhdx: fail vmdk: fail vpc: fail luks: fail The errors are a mixture I/O and "image not in xxx format", such as: === Check disconnect before data === Unexpected end-of-file before all bytes were read -read failed: Input/output error +can't open device nbd+tcp://127.0.0.1:PORT/foo: Could not open 'nbd://127.0.0.1:PORT/foo': Input/output error === Check disconnect after data === -read 512/512 bytes at offset 0 -512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +can't open device nbd+tcp://127.0.0.1:PORT/foo: Image not in qcow format I'm not aware if there's a quick fix, so, for the time being, it looks like the honest approach is to make the test known to work on raw only. Signed-off-by: Cleber Rosa <crosa@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/083 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/qemu-iotests/083 b/tests/qemu-iotests/083 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/083 +++ b/tests/qemu-iotests/083 @@ -XXX,XX +XXX,XX @@ trap "_cleanup; exit \$status" 0 1 2 3 15 . ./common.rc . ./common.filter -_supported_fmt generic +_supported_fmt raw _supported_proto nbd _supported_os Linux -- 2.19.1 Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> --- block/vpc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/block/vpc.c b/block/vpc.c index XXXXXXX..XXXXXXX 100644 --- a/block/vpc.c +++ b/block/vpc.c @@ -XXX,XX +XXX,XX @@ static int vpc_open(BlockDriverState *bs, QDict *options, int flags, } qemu_co_mutex_init(&s->lock); + qemu_opts_del(opts); return 0; fail: + qemu_opts_del(opts); qemu_vfree(s->pagetable); #ifdef CACHE g_free(s->pageentry_u8); -- 2.19.1 From: Peter Maydell <peter.maydell@linaro.org> Taking the address of a field in a packed struct is a bad idea, because it might not be actually aligned enough for that pointer type (and thus cause a crash on dereference on some host architectures). Newer versions of clang warn about this. Avoid the bug by not using the "modify in place" byte swapping functions. There are a few places where the in-place swap function is used on something other than a packed struct field; we convert those anyway, for consistency. Patch produced with scripts/coccinelle/inplace-byteswaps.cocci. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/vhdx.h | 12 ++--- block/vhdx-endian.c | 118 ++++++++++++++++++++++---------------------- block/vhdx-log.c | 4 +- block/vhdx.c | 18 +++---- 4 files changed, 76 insertions(+), 76 deletions(-) diff --git a/block/vhdx.h b/block/vhdx.h index XXXXXXX..XXXXXXX 100644 --- a/block/vhdx.h +++ b/block/vhdx.h @@ -XXX,XX +XXX,XX @@ int vhdx_log_write_and_flush(BlockDriverState *bs, BDRVVHDXState *s, static inline void leguid_to_cpus(MSGUID *guid) { - le32_to_cpus(&guid->data1); - le16_to_cpus(&guid->data2); - le16_to_cpus(&guid->data3); + guid->data1 = le32_to_cpu(guid->data1); + guid->data2 = le16_to_cpu(guid->data2); + guid->data3 = le16_to_cpu(guid->data3); } static inline void cpu_to_leguids(MSGUID *guid) { - cpu_to_le32s(&guid->data1); - cpu_to_le16s(&guid->data2); - cpu_to_le16s(&guid->data3); + guid->data1 = cpu_to_le32(guid->data1); + guid->data2 = cpu_to_le16(guid->data2); + guid->data3 = cpu_to_le16(guid->data3); } void vhdx_header_le_import(VHDXHeader *h); diff --git a/block/vhdx-endian.c b/block/vhdx-endian.c index XXXXXXX..XXXXXXX 100644 --- a/block/vhdx-endian.c +++ b/block/vhdx-endian.c @@ -XXX,XX +XXX,XX @@ void vhdx_header_le_import(VHDXHeader *h) { assert(h != NULL); - le32_to_cpus(&h->signature); - le32_to_cpus(&h->checksum); - le64_to_cpus(&h->sequence_number); + h->signature = le32_to_cpu(h->signature); + h->checksum = le32_to_cpu(h->checksum); + h->sequence_number = le64_to_cpu(h->sequence_number); leguid_to_cpus(&h->file_write_guid); leguid_to_cpus(&h->data_write_guid); leguid_to_cpus(&h->log_guid); - le16_to_cpus(&h->log_version); - le16_to_cpus(&h->version); - le32_to_cpus(&h->log_length); - le64_to_cpus(&h->log_offset); + h->log_version = le16_to_cpu(h->log_version); + h->version = le16_to_cpu(h->version); + h->log_length = le32_to_cpu(h->log_length); + h->log_offset = le64_to_cpu(h->log_offset); } void vhdx_header_le_export(VHDXHeader *orig_h, VHDXHeader *new_h) @@ -XXX,XX +XXX,XX @@ void vhdx_log_desc_le_import(VHDXLogDescriptor *d) { assert(d != NULL); - le32_to_cpus(&d->signature); - le64_to_cpus(&d->file_offset); - le64_to_cpus(&d->sequence_number); + d->signature = le32_to_cpu(d->signature); + d->file_offset = le64_to_cpu(d->file_offset); + d->sequence_number = le64_to_cpu(d->sequence_number); } void vhdx_log_desc_le_export(VHDXLogDescriptor *d) { assert(d != NULL); - cpu_to_le32s(&d->signature); - cpu_to_le32s(&d->trailing_bytes); - cpu_to_le64s(&d->leading_bytes); - cpu_to_le64s(&d->file_offset); - cpu_to_le64s(&d->sequence_number); + d->signature = cpu_to_le32(d->signature); + d->trailing_bytes = cpu_to_le32(d->trailing_bytes); + d->leading_bytes = cpu_to_le64(d->leading_bytes); + d->file_offset = cpu_to_le64(d->file_offset); + d->sequence_number = cpu_to_le64(d->sequence_number); } void vhdx_log_data_le_import(VHDXLogDataSector *d) { assert(d != NULL); - le32_to_cpus(&d->data_signature); - le32_to_cpus(&d->sequence_high); - le32_to_cpus(&d->sequence_low); + d->data_signature = le32_to_cpu(d->data_signature); + d->sequence_high = le32_to_cpu(d->sequence_high); + d->sequence_low = le32_to_cpu(d->sequence_low); } void vhdx_log_data_le_export(VHDXLogDataSector *d) { assert(d != NULL); - cpu_to_le32s(&d->data_signature); - cpu_to_le32s(&d->sequence_high); - cpu_to_le32s(&d->sequence_low); + d->data_signature = cpu_to_le32(d->data_signature); + d->sequence_high = cpu_to_le32(d->sequence_high); + d->sequence_low = cpu_to_le32(d->sequence_low); } void vhdx_log_entry_hdr_le_import(VHDXLogEntryHeader *hdr) { assert(hdr != NULL); - le32_to_cpus(&hdr->signature); - le32_to_cpus(&hdr->checksum); - le32_to_cpus(&hdr->entry_length); - le32_to_cpus(&hdr->tail); - le64_to_cpus(&hdr->sequence_number); - le32_to_cpus(&hdr->descriptor_count); + hdr->signature = le32_to_cpu(hdr->signature); + hdr->checksum = le32_to_cpu(hdr->checksum); + hdr->entry_length = le32_to_cpu(hdr->entry_length); + hdr->tail = le32_to_cpu(hdr->tail); + hdr->sequence_number = le64_to_cpu(hdr->sequence_number); + hdr->descriptor_count = le32_to_cpu(hdr->descriptor_count); leguid_to_cpus(&hdr->log_guid); - le64_to_cpus(&hdr->flushed_file_offset); - le64_to_cpus(&hdr->last_file_offset); + hdr->flushed_file_offset = le64_to_cpu(hdr->flushed_file_offset); + hdr->last_file_offset = le64_to_cpu(hdr->last_file_offset); } void vhdx_log_entry_hdr_le_export(VHDXLogEntryHeader *hdr) { assert(hdr != NULL); - cpu_to_le32s(&hdr->signature); - cpu_to_le32s(&hdr->checksum); - cpu_to_le32s(&hdr->entry_length); - cpu_to_le32s(&hdr->tail); - cpu_to_le64s(&hdr->sequence_number); - cpu_to_le32s(&hdr->descriptor_count); + hdr->signature = cpu_to_le32(hdr->signature); + hdr->checksum = cpu_to_le32(hdr->checksum); + hdr->entry_length = cpu_to_le32(hdr->entry_length); + hdr->tail = cpu_to_le32(hdr->tail); + hdr->sequence_number = cpu_to_le64(hdr->sequence_number); + hdr->descriptor_count = cpu_to_le32(hdr->descriptor_count); cpu_to_leguids(&hdr->log_guid); - cpu_to_le64s(&hdr->flushed_file_offset); - cpu_to_le64s(&hdr->last_file_offset); + hdr->flushed_file_offset = cpu_to_le64(hdr->flushed_file_offset); + hdr->last_file_offset = cpu_to_le64(hdr->last_file_offset); } @@ -XXX,XX +XXX,XX @@ void vhdx_region_header_le_import(VHDXRegionTableHeader *hdr) { assert(hdr != NULL); - le32_to_cpus(&hdr->signature); - le32_to_cpus(&hdr->checksum); - le32_to_cpus(&hdr->entry_count); + hdr->signature = le32_to_cpu(hdr->signature); + hdr->checksum = le32_to_cpu(hdr->checksum); + hdr->entry_count = le32_to_cpu(hdr->entry_count); } void vhdx_region_header_le_export(VHDXRegionTableHeader *hdr) { assert(hdr != NULL); - cpu_to_le32s(&hdr->signature); - cpu_to_le32s(&hdr->checksum); - cpu_to_le32s(&hdr->entry_count); + hdr->signature = cpu_to_le32(hdr->signature); + hdr->checksum = cpu_to_le32(hdr->checksum); + hdr->entry_count = cpu_to_le32(hdr->entry_count); } void vhdx_region_entry_le_import(VHDXRegionTableEntry *e) @@ -XXX,XX +XXX,XX @@ void vhdx_region_entry_le_import(VHDXRegionTableEntry *e) assert(e != NULL); leguid_to_cpus(&e->guid); - le64_to_cpus(&e->file_offset); - le32_to_cpus(&e->length); - le32_to_cpus(&e->data_bits); + e->file_offset = le64_to_cpu(e->file_offset); + e->length = le32_to_cpu(e->length); + e->data_bits = le32_to_cpu(e->data_bits); } void vhdx_region_entry_le_export(VHDXRegionTableEntry *e) @@ -XXX,XX +XXX,XX @@ void vhdx_region_entry_le_export(VHDXRegionTableEntry *e) assert(e != NULL); cpu_to_leguids(&e->guid); - cpu_to_le64s(&e->file_offset); - cpu_to_le32s(&e->length); - cpu_to_le32s(&e->data_bits); + e->file_offset = cpu_to_le64(e->file_offset); + e->length = cpu_to_le32(e->length); + e->data_bits = cpu_to_le32(e->data_bits); } @@ -XXX,XX +XXX,XX @@ void vhdx_metadata_header_le_import(VHDXMetadataTableHeader *hdr) { assert(hdr != NULL); - le64_to_cpus(&hdr->signature); - le16_to_cpus(&hdr->entry_count); + hdr->signature = le64_to_cpu(hdr->signature); + hdr->entry_count = le16_to_cpu(hdr->entry_count); } void vhdx_metadata_header_le_export(VHDXMetadataTableHeader *hdr) { assert(hdr != NULL); - cpu_to_le64s(&hdr->signature); - cpu_to_le16s(&hdr->entry_count); + hdr->signature = cpu_to_le64(hdr->signature); + hdr->entry_count = cpu_to_le16(hdr->entry_count); } void vhdx_metadata_entry_le_import(VHDXMetadataTableEntry *e) @@ -XXX,XX +XXX,XX @@ void vhdx_metadata_entry_le_import(VHDXMetadataTableEntry *e) assert(e != NULL); leguid_to_cpus(&e->item_id); - le32_to_cpus(&e->offset); - le32_to_cpus(&e->length); - le32_to_cpus(&e->data_bits); + e->offset = le32_to_cpu(e->offset); + e->length = le32_to_cpu(e->length); + e->data_bits = le32_to_cpu(e->data_bits); } void vhdx_metadata_entry_le_export(VHDXMetadataTableEntry *e) { assert(e != NULL); cpu_to_leguids(&e->item_id); - cpu_to_le32s(&e->offset); - cpu_to_le32s(&e->length); - cpu_to_le32s(&e->data_bits); + e->offset = cpu_to_le32(e->offset); + e->length = cpu_to_le32(e->length); + e->data_bits = cpu_to_le32(e->data_bits); } diff --git a/block/vhdx-log.c b/block/vhdx-log.c index XXXXXXX..XXXXXXX 100644 --- a/block/vhdx-log.c +++ b/block/vhdx-log.c @@ -XXX,XX +XXX,XX @@ static void vhdx_log_raw_to_le_sector(VHDXLogDescriptor *desc, /* 8 + 4084 + 4 = 4096, 1 log sector */ memcpy(&desc->leading_bytes, data, 8); data += 8; - cpu_to_le64s(&desc->leading_bytes); + desc->leading_bytes = cpu_to_le64(desc->leading_bytes); memcpy(sector->data, data, 4084); data += 4084; memcpy(&desc->trailing_bytes, data, 4); - cpu_to_le32s(&desc->trailing_bytes); + desc->trailing_bytes = cpu_to_le32(desc->trailing_bytes); data += 4; sector->sequence_high = (uint32_t) (seq >> 32); diff --git a/block/vhdx.c b/block/vhdx.c index XXXXXXX..XXXXXXX 100644 --- a/block/vhdx.c +++ b/block/vhdx.c @@ -XXX,XX +XXX,XX @@ uint32_t vhdx_update_checksum(uint8_t *buf, size_t size, int crc_offset) memset(buf + crc_offset, 0, sizeof(crc)); crc = crc32c(0xffffffff, buf, size); - cpu_to_le32s(&crc); + crc = cpu_to_le32(crc); memcpy(buf + crc_offset, &crc, sizeof(crc)); return crc; @@ -XXX,XX +XXX,XX @@ static int vhdx_parse_metadata(BlockDriverState *bs, BDRVVHDXState *s) goto exit; } - le32_to_cpus(&s->params.block_size); - le32_to_cpus(&s->params.data_bits); + s->params.block_size = le32_to_cpu(s->params.block_size); + s->params.data_bits = le32_to_cpu(s->params.data_bits); /* We now have the file parameters, so we can tell if this is a @@ -XXX,XX +XXX,XX @@ static int vhdx_parse_metadata(BlockDriverState *bs, BDRVVHDXState *s) goto exit; } - le64_to_cpus(&s->virtual_disk_size); - le32_to_cpus(&s->logical_sector_size); - le32_to_cpus(&s->physical_sector_size); + s->virtual_disk_size = le64_to_cpu(s->virtual_disk_size); + s->logical_sector_size = le32_to_cpu(s->logical_sector_size); + s->physical_sector_size = le32_to_cpu(s->physical_sector_size); if (s->params.block_size < VHDX_BLOCK_SIZE_MIN || s->params.block_size > VHDX_BLOCK_SIZE_MAX) { @@ -XXX,XX +XXX,XX @@ static int vhdx_open(BlockDriverState *bs, QDict *options, int flags, /* endian convert, and verify populated BAT field file offsets against * region table and log entries */ for (i = 0; i < s->bat_entries; i++) { - le64_to_cpus(&s->bat[i]); + s->bat[i] = le64_to_cpu(s->bat[i]); if (payblocks--) { /* payload bat entries */ if ((s->bat[i] & VHDX_BAT_STATE_BIT_MASK) == @@ -XXX,XX +XXX,XX @@ static int vhdx_create_new_metadata(BlockBackend *blk, mt_file_params->block_size = cpu_to_le32(block_size); if (type == VHDX_TYPE_FIXED) { mt_file_params->data_bits |= VHDX_PARAMS_LEAVE_BLOCKS_ALLOCED; - cpu_to_le32s(&mt_file_params->data_bits); + mt_file_params->data_bits = cpu_to_le32(mt_file_params->data_bits); } vhdx_guid_generate(&mt_page83->page_83_data); @@ -XXX,XX +XXX,XX @@ static int vhdx_create_bat(BlockBackend *blk, BDRVVHDXState *s, sinfo.file_offset = ROUND_UP(sinfo.file_offset, MiB); vhdx_update_bat_table_entry(blk_bs(blk), s, &sinfo, &unused, &unused, block_state); - cpu_to_le64s(&s->bat[sinfo.bat_idx]); + s->bat[sinfo.bat_idx] = cpu_to_le64(s->bat[sinfo.bat_idx]); sector_num += s->sectors_per_block; } ret = blk_pwrite(blk, file_offset, s->bat, length, 0); -- 2.19.1 From: Peter Maydell <peter.maydell@linaro.org> Taking the address of a field in a packed struct is a bad idea, because it might not be actually aligned enough for that pointer type (and thus cause a crash on dereference on some host architectures). Newer versions of clang warn about this. Avoid the bug by not using the "modify in place" byte swapping functions. There are a few places where the in-place swap function is used on something other than a packed struct field; we convert those anyway, for consistency. Patch produced with scripts/coccinelle/inplace-byteswaps.cocci. There are other places where we take the address of a packed member in this file for other purposes than passing it to a byteswap function (all the calls to qemu_uuid_*()); we leave those for now. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/vdi.c | 64 ++++++++++++++++++++++++++--------------------------- 1 file changed, 32 insertions(+), 32 deletions(-) diff --git a/block/vdi.c b/block/vdi.c index XXXXXXX..XXXXXXX 100644 --- a/block/vdi.c +++ b/block/vdi.c @@ -XXX,XX +XXX,XX @@ typedef struct { static void vdi_header_to_cpu(VdiHeader *header) { - le32_to_cpus(&header->signature); - le32_to_cpus(&header->version); - le32_to_cpus(&header->header_size); - le32_to_cpus(&header->image_type); - le32_to_cpus(&header->image_flags); - le32_to_cpus(&header->offset_bmap); - le32_to_cpus(&header->offset_data); - le32_to_cpus(&header->cylinders); - le32_to_cpus(&header->heads); - le32_to_cpus(&header->sectors); - le32_to_cpus(&header->sector_size); - le64_to_cpus(&header->disk_size); - le32_to_cpus(&header->block_size); - le32_to_cpus(&header->block_extra); - le32_to_cpus(&header->blocks_in_image); - le32_to_cpus(&header->blocks_allocated); + header->signature = le32_to_cpu(header->signature); + header->version = le32_to_cpu(header->version); + header->header_size = le32_to_cpu(header->header_size); + header->image_type = le32_to_cpu(header->image_type); + header->image_flags = le32_to_cpu(header->image_flags); + header->offset_bmap = le32_to_cpu(header->offset_bmap); + header->offset_data = le32_to_cpu(header->offset_data); + header->cylinders = le32_to_cpu(header->cylinders); + header->heads = le32_to_cpu(header->heads); + header->sectors = le32_to_cpu(header->sectors); + header->sector_size = le32_to_cpu(header->sector_size); + header->disk_size = le64_to_cpu(header->disk_size); + header->block_size = le32_to_cpu(header->block_size); + header->block_extra = le32_to_cpu(header->block_extra); + header->blocks_in_image = le32_to_cpu(header->blocks_in_image); + header->blocks_allocated = le32_to_cpu(header->blocks_allocated); qemu_uuid_bswap(&header->uuid_image); qemu_uuid_bswap(&header->uuid_last_snap); qemu_uuid_bswap(&header->uuid_link); @@ -XXX,XX +XXX,XX @@ static void vdi_header_to_cpu(VdiHeader *header) static void vdi_header_to_le(VdiHeader *header) { - cpu_to_le32s(&header->signature); - cpu_to_le32s(&header->version); - cpu_to_le32s(&header->header_size); - cpu_to_le32s(&header->image_type); - cpu_to_le32s(&header->image_flags); - cpu_to_le32s(&header->offset_bmap); - cpu_to_le32s(&header->offset_data); - cpu_to_le32s(&header->cylinders); - cpu_to_le32s(&header->heads); - cpu_to_le32s(&header->sectors); - cpu_to_le32s(&header->sector_size); - cpu_to_le64s(&header->disk_size); - cpu_to_le32s(&header->block_size); - cpu_to_le32s(&header->block_extra); - cpu_to_le32s(&header->blocks_in_image); - cpu_to_le32s(&header->blocks_allocated); + header->signature = cpu_to_le32(header->signature); + header->version = cpu_to_le32(header->version); + header->header_size = cpu_to_le32(header->header_size); + header->image_type = cpu_to_le32(header->image_type); + header->image_flags = cpu_to_le32(header->image_flags); + header->offset_bmap = cpu_to_le32(header->offset_bmap); + header->offset_data = cpu_to_le32(header->offset_data); + header->cylinders = cpu_to_le32(header->cylinders); + header->heads = cpu_to_le32(header->heads); + header->sectors = cpu_to_le32(header->sectors); + header->sector_size = cpu_to_le32(header->sector_size); + header->disk_size = cpu_to_le64(header->disk_size); + header->block_size = cpu_to_le32(header->block_size); + header->block_extra = cpu_to_le32(header->block_extra); + header->blocks_in_image = cpu_to_le32(header->blocks_in_image); + header->blocks_allocated = cpu_to_le32(header->blocks_allocated); qemu_uuid_bswap(&header->uuid_image); qemu_uuid_bswap(&header->uuid_last_snap); qemu_uuid_bswap(&header->uuid_link); -- 2.19.1 From: Alberto Garcia <berto@igalia.com> This is a static function with only one caller, so there's no need to keep it. Inlining the code in quorum_compare() makes it much simpler. Signed-off-by: Alberto Garcia <berto@igalia.com> Reported-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/quorum.c | 24 +++++------------------- 1 file changed, 5 insertions(+), 19 deletions(-) diff --git a/block/quorum.c b/block/quorum.c index XXXXXXX..XXXXXXX 100644 --- a/block/quorum.c +++ b/block/quorum.c @@ -XXX,XX +XXX,XX @@ static bool quorum_iovec_compare(QEMUIOVector *a, QEMUIOVector *b) return true; } -static void GCC_FMT_ATTR(2, 3) quorum_err(QuorumAIOCB *acb, - const char *fmt, ...) -{ - va_list ap; - - va_start(ap, fmt); - fprintf(stderr, "quorum: offset=%" PRIu64 " bytes=%" PRIu64 " ", - acb->offset, acb->bytes); - vfprintf(stderr, fmt, ap); - fprintf(stderr, "\n"); - va_end(ap); - exit(1); -} - -static bool quorum_compare(QuorumAIOCB *acb, - QEMUIOVector *a, - QEMUIOVector *b) +static bool quorum_compare(QuorumAIOCB *acb, QEMUIOVector *a, QEMUIOVector *b) { BDRVQuorumState *s = acb->bs->opaque; ssize_t offset; @@ -XXX,XX +XXX,XX @@ static bool quorum_compare(QuorumAIOCB *acb, if (s->is_blkverify) { offset = qemu_iovec_compare(a, b); if (offset != -1) { - quorum_err(acb, "contents mismatch at offset %" PRIu64, - acb->offset + offset); + fprintf(stderr, "quorum: offset=%" PRIu64 " bytes=%" PRIu64 + " contents mismatch at offset %" PRIu64 "\n", + acb->offset, acb->bytes, acb->offset + offset); + exit(1); } return true; } -- 2.19.1 From: Alberto Garcia <berto@igalia.com> The blkverify mode of Quorum can only be enabled if the number of children is exactly two and the value of vote-threshold is also two. If the user tries to enable it but the other settings are incorrect then QEMU simply prints an error message to stderr and carries on disabling the blkverify setting. This patch makes quorum_open() fail and return an error in this case. Signed-off-by: Alberto Garcia <berto@igalia.com> Reported-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/quorum.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/block/quorum.c b/block/quorum.c index XXXXXXX..XXXXXXX 100644 --- a/block/quorum.c +++ b/block/quorum.c @@ -XXX,XX +XXX,XX @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags, s->read_pattern = ret; if (s->read_pattern == QUORUM_READ_PATTERN_QUORUM) { - /* is the driver in blkverify mode */ - if (qemu_opt_get_bool(opts, QUORUM_OPT_BLKVERIFY, false) && - s->num_children == 2 && s->threshold == 2) { - s->is_blkverify = true; - } else if (qemu_opt_get_bool(opts, QUORUM_OPT_BLKVERIFY, false)) { - fprintf(stderr, "blkverify mode is set by setting blkverify=on " - "and using two files with vote_threshold=2\n"); + s->is_blkverify = qemu_opt_get_bool(opts, QUORUM_OPT_BLKVERIFY, false); + if (s->is_blkverify && (s->num_children != 2 || s->threshold != 2)) { + error_setg(&local_err, "blkverify=on can only be set if there are " + "exactly two files and vote-threshold is 2"); + ret = -EINVAL; + goto exit; } s->rewrite_corrupted = qemu_opt_get_bool(opts, QUORUM_OPT_REWRITE, -- 2.19.1 From: Alberto Garcia <berto@igalia.com> Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/081 | 30 ++++++++++++++++++++++++++++++ tests/qemu-iotests/081.out | 16 ++++++++++++++++ 2 files changed, 46 insertions(+) diff --git a/tests/qemu-iotests/081 b/tests/qemu-iotests/081 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/081 +++ b/tests/qemu-iotests/081 @@ -XXX,XX +XXX,XX @@ echo "== checking that quorum is broken ==" $QEMU_IO -c "open -o $quorum" -c "read -P 0x32 0 $size" | _filter_qemu_io +echo +echo "== checking the blkverify mode with broken content ==" + +quorum="driver=raw,file.driver=quorum,file.vote-threshold=2,file.blkverify=on" +quorum="$quorum,file.children.0.file.filename=$TEST_DIR/1.raw" +quorum="$quorum,file.children.1.file.filename=$TEST_DIR/2.raw" +quorum="$quorum,file.children.0.driver=raw" +quorum="$quorum,file.children.1.driver=raw" + +$QEMU_IO -c "open -o $quorum" -c "read -P 0x32 0 $size" | _filter_qemu_io + +echo +echo "== writing the same data to both files ==" + +$QEMU_IO -c "write -P 0x32 0 $size" "$TEST_DIR/1.raw" | _filter_qemu_io +$QEMU_IO -c "write -P 0x32 0 $size" "$TEST_DIR/2.raw" | _filter_qemu_io + +echo +echo "== checking the blkverify mode with valid content ==" + +$QEMU_IO -c "open -o $quorum" -c "read -P 0x32 0 $size" | _filter_qemu_io + +echo +echo "== checking the blkverify mode with invalid settings ==" + +quorum="$quorum,file.children.2.file.filename=$TEST_DIR/3.raw" +quorum="$quorum,file.children.2.driver=raw" + +$QEMU_IO -c "open -o $quorum" | _filter_qemu_io + # success, all done echo "*** done" rm -f $seq.full diff --git a/tests/qemu-iotests/081.out b/tests/qemu-iotests/081.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/081.out +++ b/tests/qemu-iotests/081.out @@ -XXX,XX +XXX,XX @@ wrote 10485760/10485760 bytes at offset 0 == checking that quorum is broken == read failed: Input/output error + +== checking the blkverify mode with broken content == +quorum: offset=0 bytes=10485760 contents mismatch at offset 0 + +== writing the same data to both files == +wrote 10485760/10485760 bytes at offset 0 +10 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 10485760/10485760 bytes at offset 0 +10 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== checking the blkverify mode with valid content == +read 10485760/10485760 bytes at offset 0 +10 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== checking the blkverify mode with invalid settings == +can't open: blkverify=on can only be set if there are exactly two files and vote-threshold is 2 *** done -- 2.19.1 From: Alberto Garcia <berto@igalia.com> The blkverify mode of Quorum only works when the number of children is exactly two, so any attempt to add a new one must return an error. quorum_del_child() on the other hand doesn't need any additional check because decreasing the number of children would make it go under the vote threshold. Signed-off-by: Alberto Garcia <berto@igalia.com> Reported-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/quorum.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/block/quorum.c b/block/quorum.c index XXXXXXX..XXXXXXX 100644 --- a/block/quorum.c +++ b/block/quorum.c @@ -XXX,XX +XXX,XX @@ static void quorum_add_child(BlockDriverState *bs, BlockDriverState *child_bs, char indexstr[32]; int ret; + if (s->is_blkverify) { + error_setg(errp, "Cannot add a child to a quorum in blkverify mode"); + return; + } + assert(s->num_children <= INT_MAX / sizeof(BdrvChild *)); if (s->num_children == INT_MAX / sizeof(BdrvChild *) || s->next_child_index == UINT_MAX) { @@ -XXX,XX +XXX,XX @@ static void quorum_del_child(BlockDriverState *bs, BdrvChild *child, return; } + /* We know now that num_children > threshold, so blkverify must be false */ + assert(!s->is_blkverify); + bdrv_drained_begin(bs); /* We can safely remove this child now */ -- 2.19.1 From: Alberto Garcia <berto@igalia.com> This patch tests that you can add and remove drives from a Quorum using the x-blockdev-change command. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- tests/qemu-iotests/081 | 86 ++++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/081.out | 54 ++++++++++++++++++++++++ 2 files changed, 140 insertions(+) diff --git a/tests/qemu-iotests/081 b/tests/qemu-iotests/081 index XXXXXXX..XXXXXXX 100755 --- a/tests/qemu-iotests/081 +++ b/tests/qemu-iotests/081 @@ -XXX,XX +XXX,XX @@ quorum="$quorum,file.children.2.driver=raw" $QEMU_IO -c "open -o $quorum" | _filter_qemu_io +echo +echo "== dynamically adding a child to a quorum ==" + +for verify in false true; do + run_qemu <<EOF + { "execute": "qmp_capabilities" } + { "execute": "blockdev-add", + "arguments": { + "driver": "quorum", + "node-name": "drive0-quorum", + "vote-threshold": 2, + "blkverify": ${verify}, + "children": [ + { + "driver": "$IMGFMT", + "file": { + "driver": "file", + "filename": "$TEST_DIR/1.raw" + } + }, + { + "driver": "$IMGFMT", + "file": { + "driver": "file", + "filename": "$TEST_DIR/2.raw" + } + } + ] + } + } + { "execute": "blockdev-add", + "arguments": { + "node-name": "drive3", + "driver": "$IMGFMT", + "file": { + "driver": "file", + "filename": "$TEST_DIR/2.raw" + } + } + } + { "execute": "x-blockdev-change", + "arguments": { "parent": "drive0-quorum", + "node": "drive3" } } + { "execute": "quit" } +EOF +done + +echo +echo "== dynamically removing a child from a quorum ==" + +for verify in false true; do + for vote_threshold in 1 2; do + run_qemu <<EOF + { "execute": "qmp_capabilities" } + { "execute": "blockdev-add", + "arguments": { + "driver": "quorum", + "node-name": "drive0-quorum", + "vote-threshold": ${vote_threshold}, + "blkverify": ${verify}, + "children": [ + { + "driver": "$IMGFMT", + "file": { + "driver": "file", + "filename": "$TEST_DIR/1.raw" + } + }, + { + "driver": "$IMGFMT", + "file": { + "driver": "file", + "filename": "$TEST_DIR/2.raw" + } + } + ] + } + } + { "execute": "x-blockdev-change", + "arguments": { "parent": "drive0-quorum", + "child": "children.1" } } + { "execute": "quit" } +EOF + done +done + # success, all done echo "*** done" rm -f $seq.full diff --git a/tests/qemu-iotests/081.out b/tests/qemu-iotests/081.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/081.out +++ b/tests/qemu-iotests/081.out @@ -XXX,XX +XXX,XX @@ read 10485760/10485760 bytes at offset 0 == checking the blkverify mode with invalid settings == can't open: blkverify=on can only be set if there are exactly two files and vote-threshold is 2 + +== dynamically adding a child to a quorum == +Testing: +QMP_VERSION +{"return": {}} +{"return": {}} +{"return": {}} +{"return": {}} +{"return": {}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}} + +Testing: +QMP_VERSION +{"return": {}} +{"return": {}} +{"return": {}} +{"error": {"class": "GenericError", "desc": "Cannot add a child to a quorum in blkverify mode"}} +{"return": {}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}} + + +== dynamically removing a child from a quorum == +Testing: +QMP_VERSION +{"return": {}} +{"return": {}} +{"return": {}} +{"return": {}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}} + +Testing: +QMP_VERSION +{"return": {}} +{"return": {}} +{"error": {"class": "GenericError", "desc": "The number of children cannot be lower than the vote threshold 2"}} +{"return": {}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}} + +Testing: +QMP_VERSION +{"return": {}} +{"error": {"class": "GenericError", "desc": "blkverify=on can only be set if there are exactly two files and vote-threshold is 2"}} +{"error": {"class": "GenericError", "desc": "Cannot find device=drive0-quorum nor node_name=drive0-quorum"}} +{"return": {}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}} + +Testing: +QMP_VERSION +{"return": {}} +{"return": {}} +{"error": {"class": "GenericError", "desc": "The number of children cannot be lower than the vote threshold 2"}} +{"return": {}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}} + *** done -- 2.19.1 To fully change the read-only state of a node, we must not only change bs->read_only, but also update bs->open_flags. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> --- block.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/block.c b/block.c index XXXXXXX..XXXXXXX 100644 --- a/block.c +++ b/block.c @@ -XXX,XX +XXX,XX @@ int bdrv_set_read_only(BlockDriverState *bs, bool read_only, Error **errp) } bs->read_only = read_only; + + if (read_only) { + bs->open_flags &= ~BDRV_O_RDWR; + } else { + bs->open_flags |= BDRV_O_RDWR; + } + return 0; } -- 2.19.1 If a management application builds the block graph node by node, the protocol layer doesn't inherit its read-only option from the format layer any more, so it must be set explicitly. Backing files should work on read-only storage, but at the same time, a block job like commit should be able to reopen them read-write if they are on read-write storage. However, without option inheritance, reopen only changes the read-only option for the root node (typically the format layer), but not the protocol layer, so reopening fails (the format layer wants to get write permissions, but the protocol layer is still read-only). A simple workaround for the problem in the management tool would be to open the protocol layer always read-write and to make only the format layer read-only for backing files. However, sometimes the file is actually stored on read-only storage and we don't know whether the image can be opened read-write (for example, for NBD it depends on the server we're trying to connect to). This adds an option that makes QEMU try to open the image read-write, but allows it to degrade to a read-only mode without returning an error. The documentation for this option is consciously phrased in a way that allows QEMU to switch to a better model eventually: Instead of trying when the image is first opened, making the read-only flag dynamic and changing it automatically whenever the first BLK_PERM_WRITE user is attached or the last one is detached would be much more useful behaviour. Unfortunately, this more useful behaviour is also a lot harder to implement, and libvirt needs a solution now before it can switch to -blockdev, so let's start with this easier approach for now. Instead of adding a new auto-read-only option, turning the existing read-only into an enum (with a bool alternate for compatibility) was considered, but it complicated the implementation to the point that it didn't seem to be worth it. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- qapi/block-core.json | 7 +++++++ include/block/block.h | 2 ++ block.c | 17 +++++++++++++++++ block/vvfat.c | 1 + blockdev.c | 2 +- 5 files changed, 28 insertions(+), 1 deletion(-) diff --git a/qapi/block-core.json b/qapi/block-core.json index XXXXXXX..XXXXXXX 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -XXX,XX +XXX,XX @@ # either generally or in certain configurations. In this case, # the default value does not work and the option must be # specified explicitly. +# @auto-read-only: if true and @read-only is false, QEMU may automatically +# decide not to open the image read-write as requested, but +# fall back to read-only instead (and switch between the modes +# later), e.g. depending on whether the image file is writable +# or whether a writing user is attached to the node +# (default: false, since 3.1) # @detect-zeroes: detect and optimize zero writes (Since 2.1) # (default: off) # @force-share: force share all permission on added nodes. @@ -XXX,XX +XXX,XX @@ '*discard': 'BlockdevDiscardOptions', '*cache': 'BlockdevCacheOptions', '*read-only': 'bool', + '*auto-read-only': 'bool', '*force-share': 'bool', '*detect-zeroes': 'BlockdevDetectZeroesOptions' }, 'discriminator': 'driver', diff --git a/include/block/block.h b/include/block/block.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -XXX,XX +XXX,XX @@ typedef struct HDGeometry { select an appropriate protocol driver, ignoring the format layer */ #define BDRV_O_NO_IO 0x10000 /* don't initialize for I/O */ +#define BDRV_O_AUTO_RDONLY 0x20000 /* degrade to read-only if opening read-write fails */ #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_NO_FLUSH) @@ -XXX,XX +XXX,XX @@ typedef struct HDGeometry { #define BDRV_OPT_CACHE_DIRECT "cache.direct" #define BDRV_OPT_CACHE_NO_FLUSH "cache.no-flush" #define BDRV_OPT_READ_ONLY "read-only" +#define BDRV_OPT_AUTO_READ_ONLY "auto-read-only" #define BDRV_OPT_DISCARD "discard" #define BDRV_OPT_FORCE_SHARE "force-share" diff --git a/block.c b/block.c index XXXXXXX..XXXXXXX 100644 --- a/block.c +++ b/block.c @@ -XXX,XX +XXX,XX @@ static void bdrv_inherited_options(int *child_flags, QDict *child_options, /* Inherit the read-only option from the parent if it's not set */ qdict_copy_default(child_options, parent_options, BDRV_OPT_READ_ONLY); + qdict_copy_default(child_options, parent_options, BDRV_OPT_AUTO_READ_ONLY); /* Our block drivers take care to send flushes and respect unmap policy, * so we can default to enable both on lower layers regardless of the @@ -XXX,XX +XXX,XX @@ static void bdrv_backing_options(int *child_flags, QDict *child_options, /* backing files always opened read-only */ qdict_set_default_str(child_options, BDRV_OPT_READ_ONLY, "on"); + qdict_set_default_str(child_options, BDRV_OPT_AUTO_READ_ONLY, "off"); flags &= ~BDRV_O_COPY_ON_READ; /* snapshot=on is handled on the top layer */ @@ -XXX,XX +XXX,XX @@ static void update_flags_from_options(int *flags, QemuOpts *opts) *flags |= BDRV_O_RDWR; } + assert(qemu_opt_find(opts, BDRV_OPT_AUTO_READ_ONLY)); + if (qemu_opt_get_bool_del(opts, BDRV_OPT_AUTO_READ_ONLY, false)) { + *flags |= BDRV_O_AUTO_RDONLY; + } } static void update_options_from_flags(QDict *options, int flags) @@ -XXX,XX +XXX,XX @@ static void update_options_from_flags(QDict *options, int flags) if (!qdict_haskey(options, BDRV_OPT_READ_ONLY)) { qdict_put_bool(options, BDRV_OPT_READ_ONLY, !(flags & BDRV_O_RDWR)); } + if (!qdict_haskey(options, BDRV_OPT_AUTO_READ_ONLY)) { + qdict_put_bool(options, BDRV_OPT_AUTO_READ_ONLY, + flags & BDRV_O_AUTO_RDONLY); + } } static void bdrv_assign_node_name(BlockDriverState *bs, @@ -XXX,XX +XXX,XX @@ QemuOptsList bdrv_runtime_opts = { .type = QEMU_OPT_BOOL, .help = "Node is opened in read-only mode", }, + { + .name = BDRV_OPT_AUTO_READ_ONLY, + .type = QEMU_OPT_BOOL, + .help = "Node can become read-only if opening read-write fails", + }, { .name = "detect-zeroes", .type = QEMU_OPT_STRING, @@ -XXX,XX +XXX,XX @@ BlockDriverState *bdrv_open_blockdev_ref(BlockdevRef *ref, Error **errp) qdict_set_default_str(qdict, BDRV_OPT_CACHE_DIRECT, "off"); qdict_set_default_str(qdict, BDRV_OPT_CACHE_NO_FLUSH, "off"); qdict_set_default_str(qdict, BDRV_OPT_READ_ONLY, "off"); + qdict_set_default_str(qdict, BDRV_OPT_AUTO_READ_ONLY, "off"); + } bs = bdrv_open_inherit(NULL, reference, qdict, 0, NULL, NULL, errp); diff --git a/block/vvfat.c b/block/vvfat.c index XXXXXXX..XXXXXXX 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -XXX,XX +XXX,XX @@ static void vvfat_qcow_options(int *child_flags, QDict *child_options, int parent_flags, QDict *parent_options) { qdict_set_default_str(child_options, BDRV_OPT_READ_ONLY, "off"); + qdict_set_default_str(child_options, BDRV_OPT_AUTO_READ_ONLY, "off"); qdict_set_default_str(child_options, BDRV_OPT_CACHE_NO_FLUSH, "on"); } diff --git a/blockdev.c b/blockdev.c index XXXXXXX..XXXXXXX 100644 --- a/blockdev.c +++ b/blockdev.c @@ -XXX,XX +XXX,XX @@ void qmp_blockdev_change_medium(bool has_device, const char *device, bdrv_flags = blk_get_open_flags_from_root_state(blk); bdrv_flags &= ~(BDRV_O_TEMPORARY | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING | - BDRV_O_PROTOCOL); + BDRV_O_PROTOCOL | BDRV_O_AUTO_RDONLY); if (!has_read_only) { read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN; -- 2.19.1 Commit e2b8247a322 introduced an error path in qemu_rbd_open() after calling rbd_open(), but neglected to close the image again in this error path. The error path should contain everything that the regular close function qemu_rbd_close() contains. This adds the missing rbd_close() call. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- block/rbd.c | 1 + 1 file changed, 1 insertion(+) diff --git a/block/rbd.c b/block/rbd.c index XXXXXXX..XXXXXXX 100644 --- a/block/rbd.c +++ b/block/rbd.c @@ -XXX,XX +XXX,XX @@ static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags, "automatically marking the image read-only."); r = bdrv_set_read_only(bs, true, &local_err); if (r < 0) { + rbd_close(s->image); error_propagate(errp, local_err); goto failed_open; } -- 2.19.1 Some block drivers have traditionally changed their node to read-only mode without asking the user. This behaviour has been marked deprecated since 2.11, expecting users to provide an explicit read-only=on option. Now that we have auto-read-only=on, enable these drivers to make use of the option. This is the only use of bdrv_set_read_only(), so we can make it a bit more specific and turn it into a bdrv_apply_auto_read_only() that is more convenient for drivers to use. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- include/block/block.h | 3 ++- block.c | 42 +++++++++++++++++++++++++++--------------- block/bochs.c | 17 ++++++----------- block/cloop.c | 16 +++++----------- block/dmg.c | 16 +++++----------- block/rbd.c | 15 ++++----------- block/vvfat.c | 10 ++-------- 7 files changed, 51 insertions(+), 68 deletions(-) diff --git a/include/block/block.h b/include/block/block.h index XXXXXXX..XXXXXXX 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -XXX,XX +XXX,XX @@ int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base, bool bdrv_is_read_only(BlockDriverState *bs); int bdrv_can_set_read_only(BlockDriverState *bs, bool read_only, bool ignore_allow_rdw, Error **errp); -int bdrv_set_read_only(BlockDriverState *bs, bool read_only, Error **errp); +int bdrv_apply_auto_read_only(BlockDriverState *bs, const char *errmsg, + Error **errp); bool bdrv_is_writable(BlockDriverState *bs); bool bdrv_is_sg(BlockDriverState *bs); bool bdrv_is_inserted(BlockDriverState *bs); diff --git a/block.c b/block.c index XXXXXXX..XXXXXXX 100644 --- a/block.c +++ b/block.c @@ -XXX,XX +XXX,XX @@ int bdrv_can_set_read_only(BlockDriverState *bs, bool read_only, return 0; } -/* TODO Remove (deprecated since 2.11) - * Block drivers are not supposed to automatically change bs->read_only. - * Instead, they should just check whether they can provide what the user - * explicitly requested and error out if read-write is requested, but they can - * only provide read-only access. */ -int bdrv_set_read_only(BlockDriverState *bs, bool read_only, Error **errp) +/* + * Called by a driver that can only provide a read-only image. + * + * Returns 0 if the node is already read-only or it could switch the node to + * read-only because BDRV_O_AUTO_RDONLY is set. + * + * Returns -EACCES if the node is read-write and BDRV_O_AUTO_RDONLY is not set + * or bdrv_can_set_read_only() forbids making the node read-only. If @errmsg + * is not NULL, it is used as the error message for the Error object. + */ +int bdrv_apply_auto_read_only(BlockDriverState *bs, const char *errmsg, + Error **errp) { int ret = 0; - ret = bdrv_can_set_read_only(bs, read_only, false, errp); - if (ret < 0) { - return ret; + if (!(bs->open_flags & BDRV_O_RDWR)) { + return 0; + } + if (!(bs->open_flags & BDRV_O_AUTO_RDONLY)) { + goto fail; } - bs->read_only = read_only; - - if (read_only) { - bs->open_flags &= ~BDRV_O_RDWR; - } else { - bs->open_flags |= BDRV_O_RDWR; + ret = bdrv_can_set_read_only(bs, true, false, NULL); + if (ret < 0) { + goto fail; } + bs->read_only = true; + bs->open_flags &= ~BDRV_O_RDWR; + return 0; + +fail: + error_setg(errp, "%s", errmsg ?: "Image is read-only"); + return -EACCES; } void bdrv_get_full_backing_filename_from_filename(const char *backed, diff --git a/block/bochs.c b/block/bochs.c index XXXXXXX..XXXXXXX 100644 --- a/block/bochs.c +++ b/block/bochs.c @@ -XXX,XX +XXX,XX @@ static int bochs_open(BlockDriverState *bs, QDict *options, int flags, struct bochs_header bochs; int ret; + /* No write support yet */ + ret = bdrv_apply_auto_read_only(bs, NULL, errp); + if (ret < 0) { + return ret; + } + bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file, false, errp); if (!bs->file) { return -EINVAL; } - if (!bdrv_is_read_only(bs)) { - error_report("Opening bochs images without an explicit read-only=on " - "option is deprecated. Future versions will refuse to " - "open the image instead of automatically marking the " - "image read-only."); - ret = bdrv_set_read_only(bs, true, errp); /* no write support yet */ - if (ret < 0) { - return ret; - } - } - ret = bdrv_pread(bs->file, 0, &bochs, sizeof(bochs)); if (ret < 0) { return ret; diff --git a/block/cloop.c b/block/cloop.c index XXXXXXX..XXXXXXX 100644 --- a/block/cloop.c +++ b/block/cloop.c @@ -XXX,XX +XXX,XX @@ static int cloop_open(BlockDriverState *bs, QDict *options, int flags, uint32_t offsets_size, max_compressed_block_size = 1, i; int ret; + ret = bdrv_apply_auto_read_only(bs, NULL, errp); + if (ret < 0) { + return ret; + } + bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file, false, errp); if (!bs->file) { return -EINVAL; } - if (!bdrv_is_read_only(bs)) { - error_report("Opening cloop images without an explicit read-only=on " - "option is deprecated. Future versions will refuse to " - "open the image instead of automatically marking the " - "image read-only."); - ret = bdrv_set_read_only(bs, true, errp); - if (ret < 0) { - return ret; - } - } - /* read header */ ret = bdrv_pread(bs->file, 128, &s->block_size, 4); if (ret < 0) { diff --git a/block/dmg.c b/block/dmg.c index XXXXXXX..XXXXXXX 100644 --- a/block/dmg.c +++ b/block/dmg.c @@ -XXX,XX +XXX,XX @@ static int dmg_open(BlockDriverState *bs, QDict *options, int flags, int64_t offset; int ret; + ret = bdrv_apply_auto_read_only(bs, NULL, errp); + if (ret < 0) { + return ret; + } + bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file, false, errp); if (!bs->file) { return -EINVAL; } - if (!bdrv_is_read_only(bs)) { - error_report("Opening dmg images without an explicit read-only=on " - "option is deprecated. Future versions will refuse to " - "open the image instead of automatically marking the " - "image read-only."); - ret = bdrv_set_read_only(bs, true, errp); - if (ret < 0) { - return ret; - } - } - block_module_load_one("dmg-bz2"); s->n_chunks = 0; diff --git a/block/rbd.c b/block/rbd.c index XXXXXXX..XXXXXXX 100644 --- a/block/rbd.c +++ b/block/rbd.c @@ -XXX,XX +XXX,XX @@ static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags, /* If we are using an rbd snapshot, we must be r/o, otherwise * leave as-is */ if (s->snap != NULL) { - if (!bdrv_is_read_only(bs)) { - error_report("Opening rbd snapshots without an explicit " - "read-only=on option is deprecated. Future versions " - "will refuse to open the image instead of " - "automatically marking the image read-only."); - r = bdrv_set_read_only(bs, true, &local_err); - if (r < 0) { - rbd_close(s->image); - error_propagate(errp, local_err); - goto failed_open; - } + r = bdrv_apply_auto_read_only(bs, "rbd snapshots are read-only", errp); + if (r < 0) { + rbd_close(s->image); + goto failed_open; } } diff --git a/block/vvfat.c b/block/vvfat.c index XXXXXXX..XXXXXXX 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -XXX,XX +XXX,XX @@ static int vvfat_open(BlockDriverState *bs, QDict *options, int flags, "Unable to set VVFAT to 'rw' when drive is read-only"); goto fail; } - } else if (!bdrv_is_read_only(bs)) { - error_report("Opening non-rw vvfat images without an explicit " - "read-only=on option is deprecated. Future versions " - "will refuse to open the image instead of " - "automatically marking the image read-only."); - /* read only is the default for safety */ - ret = bdrv_set_read_only(bs, true, &local_err); + } else { + ret = bdrv_apply_auto_read_only(bs, NULL, errp); if (ret < 0) { - error_propagate(errp, local_err); goto fail; } } -- 2.19.1 If read-only=off, but auto-read-only=on is given, open a read-write NBD connection if the server provides a read-write export, but instead of erroring out for read-only exports, just degrade to read-only. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- block/nbd-client.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/block/nbd-client.c b/block/nbd-client.c index XXXXXXX..XXXXXXX 100644 --- a/block/nbd-client.c +++ b/block/nbd-client.c @@ -XXX,XX +XXX,XX @@ int nbd_client_init(BlockDriverState *bs, logout("Failed to negotiate with the NBD server\n"); return ret; } - if (client->info.flags & NBD_FLAG_READ_ONLY && - !bdrv_is_read_only(bs)) { - error_setg(errp, - "request for write access conflicts with read-only export"); - return -EACCES; + if (client->info.flags & NBD_FLAG_READ_ONLY) { + ret = bdrv_apply_auto_read_only(bs, "NBD export is read-only", errp); + if (ret < 0) { + return ret; + } } if (client->info.flags & NBD_FLAG_SEND_FUA) { bs->supported_write_flags = BDRV_REQ_FUA; -- 2.19.1 If read-only=off, but auto-read-only=on is given, open the file read-write if we have the permissions, but instead of erroring out for read-only files, just degrade to read-only. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- block/file-posix.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index XXXXXXX..XXXXXXX 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -XXX,XX +XXX,XX @@ static int raw_open_common(BlockDriverState *bs, QDict *options, s->fd = -1; fd = qemu_open(filename, s->open_flags, 0644); - if (fd < 0) { - ret = -errno; - error_setg_errno(errp, errno, "Could not open '%s'", filename); + ret = fd < 0 ? -errno : 0; + + if (ret == -EACCES || ret == -EROFS) { + /* Try to degrade to read-only, but if it doesn't work, still use the + * normal error message. */ + if (bdrv_apply_auto_read_only(bs, NULL, NULL) == 0) { + bdrv_flags &= ~BDRV_O_RDWR; + raw_parse_flags(bdrv_flags, &s->open_flags); + assert(!(s->open_flags & O_CREAT)); + fd = qemu_open(filename, s->open_flags); + ret = fd < 0 ? -errno : 0; + } + } + + if (ret < 0) { + error_setg_errno(errp, -ret, "Could not open '%s'", filename); if (ret == -EROFS) { ret = -EACCES; } -- 2.19.1 If read-only=off, but auto-read-only=on is given, just degrade to read-only. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- block/curl.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/block/curl.c b/block/curl.c index XXXXXXX..XXXXXXX 100644 --- a/block/curl.c +++ b/block/curl.c @@ -XXX,XX +XXX,XX @@ static int curl_open(BlockDriverState *bs, QDict *options, int flags, const char *protocol_delimiter; int ret; - - if (flags & BDRV_O_RDWR) { - error_setg(errp, "curl block device does not support writes"); - return -EROFS; + ret = bdrv_apply_auto_read_only(bs, "curl driver does not support writes", + errp); + if (ret < 0) { + return ret; } if (!libcurl_initialized) { -- 2.19.1 If read-only=off, but auto-read-only=on is given, open the file read-write if we have the permissions, but instead of erroring out for read-only files, just degrade to read-only. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Niels de Vos <ndevos@redhat.com> --- block/gluster.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/block/gluster.c b/block/gluster.c index XXXXXXX..XXXXXXX 100644 --- a/block/gluster.c +++ b/block/gluster.c @@ -XXX,XX +XXX,XX @@ static int qemu_gluster_open(BlockDriverState *bs, QDict *options, qemu_gluster_parse_flags(bdrv_flags, &open_flags); s->fd = glfs_open(s->glfs, gconf->path, open_flags); - if (!s->fd) { - ret = -errno; + ret = s->fd ? 0 : -errno; + + if (ret == -EACCES || ret == -EROFS) { + /* Try to degrade to read-only, but if it doesn't work, still use the + * normal error message. */ + if (bdrv_apply_auto_read_only(bs, NULL, NULL) == 0) { + open_flags = (open_flags & ~O_RDWR) | O_RDONLY; + s->fd = glfs_open(s->glfs, gconf->path, open_flags); + ret = s->fd ? 0 : -errno; + } } s->supports_seek_data = qemu_gluster_test_seek(s->fd); -- 2.19.1 If read-only=off, but auto-read-only=on is given, open the volume read-write if we have the permissions, but instead of erroring out for read-only volumes, just degrade to read-only. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- block/iscsi.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/block/iscsi.c b/block/iscsi.c index XXXXXXX..XXXXXXX 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -XXX,XX +XXX,XX @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags, /* Check the write protect flag of the LUN if we want to write */ if (iscsilun->type == TYPE_DISK && (flags & BDRV_O_RDWR) && iscsilun->write_protected) { - error_setg(errp, "Cannot open a write protected LUN as read-write"); - ret = -EACCES; - goto out; + ret = bdrv_apply_auto_read_only(bs, "LUN is write protected", errp); + if (ret < 0) { + goto out; + } + flags &= ~BDRV_O_RDWR; } iscsi_readcapacity_sync(iscsilun, &local_err); -- 2.19.1 While we want machine interfaces like -blockdev and QMP blockdev-add to add as little auto-detection as possible so that management tools are explicit about their needs, -drive is a convenience option for human users. Enabling auto-read-only=on by default there enables users to use read-only images for read-only guest devices without having to specify read-only=on explicitly. If they try to attach the image to a read-write device, they will still get an error message. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- blockdev.c | 1 + 1 file changed, 1 insertion(+) diff --git a/blockdev.c b/blockdev.c index XXXXXXX..XXXXXXX 100644 --- a/blockdev.c +++ b/blockdev.c @@ -XXX,XX +XXX,XX @@ static BlockBackend *blockdev_init(const char *file, QDict *bs_opts, qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off"); qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, read_only ? "on" : "off"); + qdict_set_default_str(bs_opts, BDRV_OPT_AUTO_READ_ONLY, "on"); assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0); if (runstate_check(RUN_STATE_INMIGRATE)) { -- 2.19.1 Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> --- tests/qemu-iotests/232 | 147 +++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/232.out | 59 +++++++++++++++ tests/qemu-iotests/group | 1 + 3 files changed, 207 insertions(+) create mode 100755 tests/qemu-iotests/232 create mode 100644 tests/qemu-iotests/232.out diff --git a/tests/qemu-iotests/232 b/tests/qemu-iotests/232 new file mode 100755 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/232 @@ -XXX,XX +XXX,XX @@ +#!/bin/bash +# +# Test for auto-read-only +# +# Copyright (C) 2018 Red Hat, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +# creator +owner=kwolf@redhat.com + +seq=`basename $0` +echo "QA output created by $seq" + +here=`pwd` +status=1 # failure is the default! + +_cleanup() +{ + _cleanup_test_img + rm -f $TEST_IMG.snap +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +_supported_fmt generic +_supported_proto file +_supported_os Linux + +function do_run_qemu() +{ + echo Testing: "$@" + ( + if ! test -t 0; then + while read cmd; do + echo $cmd + done + fi + echo quit + ) | $QEMU -nographic -monitor stdio -nodefaults "$@" + echo +} + +function run_qemu() +{ + do_run_qemu "$@" 2>&1 | _filter_testdir | _filter_qemu | _filter_hmp | + _filter_generated_node_ids | _filter_imgfmt +} + +function run_qemu_info_block() +{ + echo "info block -n" | run_qemu "$@" | grep -e "(file" -e "QEMU_PROG" +} + +size=128M + +_make_test_img $size + +echo +echo "=== -drive with read-write image: read-only/auto-read-only combinations ===" +echo + +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,read-only=on,auto-read-only=off +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,read-only=on,auto-read-only=on +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,read-only=on +echo +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,read-only=off,auto-read-only=off +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,read-only=off,auto-read-only=on +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,read-only=off +echo +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,auto-read-only=off +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,auto-read-only=on +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none + +echo +echo "=== -drive with read-only image: read-only/auto-read-only combinations ===" +echo + +chmod a-w $TEST_IMG + +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,read-only=on,auto-read-only=off +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,read-only=on,auto-read-only=on +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,read-only=on +echo +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,read-only=off,auto-read-only=off +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,read-only=off,auto-read-only=on +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,read-only=off +echo +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,auto-read-only=off +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none,auto-read-only=on +run_qemu_info_block -drive driver=file,file="$TEST_IMG",if=none + +echo +echo "=== -blockdev with read-write image: read-only/auto-read-only combinations ===" +echo + +chmod a+w $TEST_IMG + +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,read-only=on,auto-read-only=off +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,read-only=on,auto-read-only=on +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,read-only=on +echo +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,read-only=off,auto-read-only=off +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,read-only=off,auto-read-only=on +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,read-only=off +echo +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,auto-read-only=off +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,auto-read-only=on +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0 + +echo +echo "=== -blockdev with read-only image: read-only/auto-read-only combinations ===" +echo + +chmod a-w $TEST_IMG + +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,read-only=on,auto-read-only=off +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,read-only=on,auto-read-only=on +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,read-only=on +echo +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,read-only=off,auto-read-only=off +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,read-only=off,auto-read-only=on +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,read-only=off +echo +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,auto-read-only=off +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,auto-read-only=on +run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0 + +# success, all done +echo "*** done" +rm -f $seq.full +status=0 diff --git a/tests/qemu-iotests/232.out b/tests/qemu-iotests/232.out new file mode 100644 index XXXXXXX..XXXXXXX --- /dev/null +++ b/tests/qemu-iotests/232.out @@ -XXX,XX +XXX,XX @@ +QA output created by 232 +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 + +=== -drive with read-write image: read-only/auto-read-only combinations === + +NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only) +NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only) +NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only) + +NODE_NAME: TEST_DIR/t.IMGFMT (file) +NODE_NAME: TEST_DIR/t.IMGFMT (file) +NODE_NAME: TEST_DIR/t.IMGFMT (file) + +NODE_NAME: TEST_DIR/t.IMGFMT (file) +NODE_NAME: TEST_DIR/t.IMGFMT (file) +NODE_NAME: TEST_DIR/t.IMGFMT (file) + +=== -drive with read-only image: read-only/auto-read-only combinations === + +NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only) +NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only) +NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only) + +QEMU_PROG: -drive driver=file,file=TEST_DIR/t.IMGFMT,if=none,read-only=off,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied +NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only) +NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only) + +QEMU_PROG: -drive driver=file,file=TEST_DIR/t.IMGFMT,if=none,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied +NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only) +NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only) + +=== -blockdev with read-write image: read-only/auto-read-only combinations === + +node0: TEST_DIR/t.IMGFMT (file, read-only) +node0: TEST_DIR/t.IMGFMT (file, read-only) +node0: TEST_DIR/t.IMGFMT (file, read-only) + +node0: TEST_DIR/t.IMGFMT (file) +node0: TEST_DIR/t.IMGFMT (file) +node0: TEST_DIR/t.IMGFMT (file) + +node0: TEST_DIR/t.IMGFMT (file) +node0: TEST_DIR/t.IMGFMT (file) +node0: TEST_DIR/t.IMGFMT (file) + +=== -blockdev with read-only image: read-only/auto-read-only combinations === + +node0: TEST_DIR/t.IMGFMT (file, read-only) +node0: TEST_DIR/t.IMGFMT (file, read-only) +node0: TEST_DIR/t.IMGFMT (file, read-only) + +QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0,read-only=off,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied +node0: TEST_DIR/t.IMGFMT (file, read-only) +QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0,read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied + +QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied +node0: TEST_DIR/t.IMGFMT (file, read-only) +QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0: Could not open 'TEST_DIR/t.IMGFMT': Permission denied +*** done diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -XXX,XX +XXX,XX @@ 227 auto quick 229 auto quick 231 auto quick +232 auto quick -- 2.19.1 From: Max Reitz <mreitz@redhat.com> This adds some whitespace into the option help (including indentation) and puts angle brackets around the type names. Furthermore, the list name is no longer printed as part of every line, but only once in advance, and only if the caller did not print a caption already. This patch also restores the description alignment we had before commit 9cbef9d68ee1d8d0, just at 24 instead of 16 characters like we used to. This increase is because now we have the type and two spaces of indentation before the description, and with a usual type name length of three chracters, this sums up to eight additional characters -- which means that we now need 24 characters to get the same amount of padding for most options. Also, 24 is a third of 80, which makes it kind of a round number in terminal terms. Finally, this patch amends the reference output of iotest 082 to match the changes (and thus makes it pass again). Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- include/qemu/option.h | 2 +- qemu-img.c | 4 +- util/qemu-option.c | 32 +- tests/qemu-iotests/082.out | 956 ++++++++++++++++++------------------- 4 files changed, 507 insertions(+), 487 deletions(-) diff --git a/include/qemu/option.h b/include/qemu/option.h index XXXXXXX..XXXXXXX 100644 --- a/include/qemu/option.h +++ b/include/qemu/option.h @@ -XXX,XX +XXX,XX @@ typedef int (*qemu_opts_loopfunc)(void *opaque, QemuOpts *opts, Error **errp); int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque, Error **errp); void qemu_opts_print(QemuOpts *opts, const char *sep); -void qemu_opts_print_help(QemuOptsList *list); +void qemu_opts_print_help(QemuOptsList *list, bool print_caption); void qemu_opts_free(QemuOptsList *list); QemuOptsList *qemu_opts_append(QemuOptsList *dst, QemuOptsList *list); diff --git a/qemu-img.c b/qemu-img.c index XXXXXXX..XXXXXXX 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -XXX,XX +XXX,XX @@ static int print_block_option_help(const char *filename, const char *fmt) } printf("Supported options:\n"); - qemu_opts_print_help(create_opts); + qemu_opts_print_help(create_opts, false); qemu_opts_free(create_opts); return 0; } @@ -XXX,XX +XXX,XX @@ static int print_amend_option_help(const char *format) assert(drv->create_opts); printf("Creation options for '%s':\n", format); - qemu_opts_print_help(drv->create_opts); + qemu_opts_print_help(drv->create_opts, false); printf("\nNote that not all of these options may be amendable.\n"); return 0; } diff --git a/util/qemu-option.c b/util/qemu-option.c index XXXXXXX..XXXXXXX 100644 --- a/util/qemu-option.c +++ b/util/qemu-option.c @@ -XXX,XX +XXX,XX @@ static const char *opt_type_to_string(enum QemuOptType type) g_assert_not_reached(); } -void qemu_opts_print_help(QemuOptsList *list) +/** + * Print the list of options available in the given list. If + * @print_caption is true, a caption (including the list name, if it + * exists) is printed. The options itself will be indented, so + * @print_caption should only be set to false if the caller prints its + * own custom caption (so that the indentation makes sense). + */ +void qemu_opts_print_help(QemuOptsList *list, bool print_caption) { QemuOptDesc *desc; int i; @@ -XXX,XX +XXX,XX @@ void qemu_opts_print_help(QemuOptsList *list) desc = list->desc; while (desc && desc->name) { GString *str = g_string_new(NULL); - if (list->name) { - g_string_append_printf(str, "%s.", list->name); - } - g_string_append_printf(str, "%s=%s", desc->name, + g_string_append_printf(str, " %s=<%s>", desc->name, opt_type_to_string(desc->type)); if (desc->help) { + if (str->len < 24) { + g_string_append_printf(str, "%*s", 24 - (int)str->len, ""); + } g_string_append_printf(str, " - %s", desc->help); } g_ptr_array_add(array, g_string_free(str, false)); @@ -XXX,XX +XXX,XX @@ void qemu_opts_print_help(QemuOptsList *list) } g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0); + if (print_caption && array->len > 0) { + if (list->name) { + printf("%s options:\n", list->name); + } else { + printf("Options:\n"); + } + } else if (array->len == 0) { + if (list->name) { + printf("There are no options for %s.\n", list->name); + } else { + printf("No options available.\n"); + } + } for (i = 0; i < array->len; i++) { printf("%s\n", (char *)array->pdata[i]); } @@ -XXX,XX +XXX,XX @@ QemuOpts *qemu_opts_parse_noisily(QemuOptsList *list, const char *params, opts = opts_parse(list, params, permit_abbrev, false, &invalidp, &err); if (err) { if (invalidp && has_help_option(params)) { - qemu_opts_print_help(list); + qemu_opts_print_help(list, true); error_free(err); } else { error_report_err(err); diff --git a/tests/qemu-iotests/082.out b/tests/qemu-iotests/082.out index XXXXXXX..XXXXXXX 100644 --- a/tests/qemu-iotests/082.out +++ b/tests/qemu-iotests/082.out @@ -XXX,XX +XXX,XX @@ cluster_size: 8192 Testing: create -f qcow2 -o help TEST_DIR/t.qcow2 128M Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: create -f qcow2 -o ? TEST_DIR/t.qcow2 128M Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: create -f qcow2 -o cluster_size=4k,help TEST_DIR/t.qcow2 128M Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: create -f qcow2 -o cluster_size=4k,? TEST_DIR/t.qcow2 128M Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: create -f qcow2 -o help,cluster_size=4k TEST_DIR/t.qcow2 128M Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: create -f qcow2 -o ?,cluster_size=4k TEST_DIR/t.qcow2 128M Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: create -f qcow2 -o cluster_size=4k -o help TEST_DIR/t.qcow2 128M Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: create -f qcow2 -o cluster_size=4k -o ? TEST_DIR/t.qcow2 128M Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: create -f qcow2 -u -o backing_file=TEST_DIR/t.qcow2,,help TEST_DIR/t.qcow2 128M Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 backing_file=TEST_DIR/t.qcow2,,help cluster_size=65536 lazy_refcounts=off refcount_bits=16 @@ -XXX,XX +XXX,XX @@ qemu-img: Invalid option list: ,, Testing: create -f qcow2 -o help Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: create -o help Supported options: -size Virtual disk size + size=<size> - Virtual disk size Testing: create -f bochs -o help qemu-img: Format driver 'bochs' does not support image creation @@ -XXX,XX +XXX,XX @@ cluster_size: 8192 Testing: convert -O qcow2 -o help TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: convert -O qcow2 -o ? TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: convert -O qcow2 -o cluster_size=4k,help TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: convert -O qcow2 -o cluster_size=4k,? TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: convert -O qcow2 -o help,cluster_size=4k TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: convert -O qcow2 -o ?,cluster_size=4k TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: convert -O qcow2 -o cluster_size=4k -o help TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: convert -O qcow2 -o cluster_size=4k -o ? TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + nocow=<bool (on/off)> - Turn off copy-on-write (valid only on btrfs) + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: convert -O qcow2 -o backing_file=TEST_DIR/t.qcow2,,help TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base qemu-img: Could not open 'TEST_DIR/t.qcow2.base': Could not open backing file: Could not open 'TEST_DIR/t.qcow2,help': No such file or directory @@ -XXX,XX +XXX,XX @@ qemu-img: Invalid option list: ,, Testing: convert -O qcow2 -o help Supported options: -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Testing: convert -o help Supported options: -size Virtual disk size + size=<size> - Virtual disk size Testing: convert -O bochs -o help qemu-img: Format driver 'bochs' does not support image creation @@ -XXX,XX +XXX,XX @@ cluster_size: 65536 Testing: amend -f qcow2 -o help TEST_DIR/t.qcow2 Creation options for 'qcow2': -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Note that not all of these options may be amendable. Testing: amend -f qcow2 -o ? TEST_DIR/t.qcow2 Creation options for 'qcow2': -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Note that not all of these options may be amendable. Testing: amend -f qcow2 -o cluster_size=4k,help TEST_DIR/t.qcow2 Creation options for 'qcow2': -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Note that not all of these options may be amendable. Testing: amend -f qcow2 -o cluster_size=4k,? TEST_DIR/t.qcow2 Creation options for 'qcow2': -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Note that not all of these options may be amendable. Testing: amend -f qcow2 -o help,cluster_size=4k TEST_DIR/t.qcow2 Creation options for 'qcow2': -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Note that not all of these options may be amendable. Testing: amend -f qcow2 -o ?,cluster_size=4k TEST_DIR/t.qcow2 Creation options for 'qcow2': -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Note that not all of these options may be amendable. Testing: amend -f qcow2 -o cluster_size=4k -o help TEST_DIR/t.qcow2 Creation options for 'qcow2': -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Note that not all of these options may be amendable. Testing: amend -f qcow2 -o cluster_size=4k -o ? TEST_DIR/t.qcow2 Creation options for 'qcow2': -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Note that not all of these options may be amendable. @@ -XXX,XX +XXX,XX @@ qemu-img: Invalid option list: ,, Testing: amend -f qcow2 -o help Creation options for 'qcow2': -size Virtual disk size -compat Compatibility level (0.10 or 1.1) -backing_file File name of a base image -backing_fmt Image format of the base image -encryption Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) -encrypt.format Encrypt the image, format choices: 'aes', 'luks' -encrypt.key-secret ID of secret providing qcow AES key or LUKS passphrase -encrypt.cipher-alg Name of encryption cipher algorithm -encrypt.cipher-mode Name of encryption cipher mode -encrypt.ivgen-alg Name of IV generator algorithm -encrypt.ivgen-hash-alg Name of IV generator hash algorithm -encrypt.hash-alg Name of encryption hash algorithm -encrypt.iter-time Time to spend in PBKDF in milliseconds -cluster_size qcow2 cluster size -preallocation Preallocation mode (allowed values: off, metadata, falloc, full) -lazy_refcounts Postpone refcount updates -refcount_bits Width of a reference count entry in bits + backing_file=<str> - File name of a base image + backing_fmt=<str> - Image format of the base image + cluster_size=<size> - qcow2 cluster size + compat=<str> - Compatibility level (0.10 or 1.1) + encrypt.cipher-alg=<str> - Name of encryption cipher algorithm + encrypt.cipher-mode=<str> - Name of encryption cipher mode + encrypt.format=<str> - Encrypt the image, format choices: 'aes', 'luks' + encrypt.hash-alg=<str> - Name of encryption hash algorithm + encrypt.iter-time=<num> - Time to spend in PBKDF in milliseconds + encrypt.ivgen-alg=<str> - Name of IV generator algorithm + encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm + encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS passphrase + encryption=<bool (on/off)> - Encrypt the image with format 'aes'. (Deprecated in favor of encrypt.format=aes) + lazy_refcounts=<bool (on/off)> - Postpone refcount updates + preallocation=<str> - Preallocation mode (allowed values: off, metadata, falloc, full) + refcount_bits=<num> - Width of a reference count entry in bits + size=<size> - Virtual disk size Note that not all of these options may be amendable. Testing: convert -o help Supported options: -size Virtual disk size + size=<size> - Virtual disk size Testing: amend -f bochs -o help qemu-img: Format driver 'bochs' does not support option amendment -- 2.19.1 From: Max Reitz <mreitz@redhat.com> Following the example of qemu_opts_print_help(), indent all entries in the list of character devices. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- chardev/char.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chardev/char.c b/chardev/char.c index XXXXXXX..XXXXXXX 100644 --- a/chardev/char.c +++ b/chardev/char.c @@ -XXX,XX +XXX,XX @@ help_string_append(const char *name, void *opaque) { GString *str = opaque; - g_string_append_printf(str, "\n%s", name); + g_string_append_printf(str, "\n %s", name); } static const char *chardev_alias_translate(const char *name) -- 2.19.1 From: Max Reitz <mreitz@redhat.com> Just like in qemu_opts_print_help(), print the device name as a caption instead of on every single line, indent all options, add angle brackets around types, and align the descriptions after 24 characters. Also, separate the descriptions with " - " instead of putting them in parentheses, because that is what we do everywhere else. This does look a bit funny here because basically all bits have the description "on/off", but funny does not mean it is less readable. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- qdev-monitor.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/qdev-monitor.c b/qdev-monitor.c index XXXXXXX..XXXXXXX 100644 --- a/qdev-monitor.c +++ b/qdev-monitor.c @@ -XXX,XX +XXX,XX @@ int qdev_device_help(QemuOpts *opts) goto error; } + if (prop_list) { + out_printf("%s options:\n", driver); + } else { + out_printf("There are no options for %s.\n", driver); + } for (prop = prop_list; prop; prop = prop->next) { - out_printf("%s.%s=%s", driver, prop->value->name, prop->value->type); + int len; + out_printf(" %s=<%s>%n", prop->value->name, prop->value->type, &len); if (prop->value->has_description) { - out_printf(" (%s)\n", prop->value->description); + if (len < 24) { + out_printf("%*s", 24 - len, ""); + } + out_printf(" - %s\n", prop->value->description); } else { out_printf("\n"); } -- 2.19.1 From: Max Reitz <mreitz@redhat.com> Just like in qemu_opts_print_help(), print the object name as a caption instead of on every single line, indent all options, add angle brackets around types, and align the descriptions after 24 characters. Also, indent every object name in the list of available objects. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- vl.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/vl.c b/vl.c index XXXXXXX..XXXXXXX 100644 --- a/vl.c +++ b/vl.c @@ -XXX,XX +XXX,XX @@ static bool object_create_initial(const char *type, QemuOpts *opts) list = object_class_get_list_sorted(TYPE_USER_CREATABLE, false); for (l = list; l != NULL; l = l->next) { ObjectClass *oc = OBJECT_CLASS(l->data); - printf("%s\n", object_class_get_name(oc)); + printf(" %s\n", object_class_get_name(oc)); } g_slist_free(list); exit(0); @@ -XXX,XX +XXX,XX @@ static bool object_create_initial(const char *type, QemuOpts *opts) } str = g_string_new(NULL); - g_string_append_printf(str, "%s.%s=%s", type, - prop->name, prop->type); + g_string_append_printf(str, " %s=<%s>", prop->name, prop->type); if (prop->description) { + if (str->len < 24) { + g_string_append_printf(str, "%*s", 24 - (int)str->len, ""); + } g_string_append_printf(str, " - %s", prop->description); } g_ptr_array_add(array, g_string_free(str, false)); } g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0); + if (array->len > 0) { + printf("%s options:\n", type); + } else { + printf("There are no options for %s.\n", type); + } for (i = 0; i < array->len; i++) { printf("%s\n", (char *)array->pdata[i]); } -- 2.19.1 From: Max Reitz <mreitz@redhat.com> There is no good reason why there should be a newline in this description, so remove it. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- vl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/vl.c b/vl.c index XXXXXXX..XXXXXXX 100644 --- a/vl.c +++ b/vl.c @@ -XXX,XX +XXX,XX @@ static QemuOptsList qemu_fw_cfg_opts = { }, { .name = "file", .type = QEMU_OPT_STRING, - .help = "Sets the name of the file from which\n" + .help = "Sets the name of the file from which " "the fw_cfg blob will be loaded", }, { .name = "string", -- 2.19.1 From: Leonid Bloch <lbloch@janustech.com> If an expression is used to define DEFAULT_CLUSTER_SIZE, when compiled, it will be embedded as a literal expression in the binary (as the default value) because it is stringified to mark the size of the default value. Now this is fixed by using a defined number to define this value. Signed-off-by: Leonid Bloch <lbloch@janustech.com> Reviewed-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/vdi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/block/vdi.c b/block/vdi.c index XXXXXXX..XXXXXXX 100644 --- a/block/vdi.c +++ b/block/vdi.c @@ -XXX,XX +XXX,XX @@ #define BLOCK_OPT_STATIC "static" #define SECTOR_SIZE 512 -#define DEFAULT_CLUSTER_SIZE (1 * MiB) +#define DEFAULT_CLUSTER_SIZE S_1MiB #if defined(CONFIG_VDI_DEBUG) #define VDI_DEBUG 1 @@ -XXX,XX +XXX,XX @@ static int vdi_open(BlockDriverState *bs, QDict *options, int flags, goto fail; } else if (header.block_size != DEFAULT_CLUSTER_SIZE) { error_setg(errp, "unsupported VDI image (block size %" PRIu32 - " is not %" PRIu64 ")", + " is not %" PRIu32 ")", header.block_size, DEFAULT_CLUSTER_SIZE); ret = -ENOTSUP; goto fail; -- 2.19.1 From: Leonid Bloch <lbloch@janustech.com> The lookup table for power-of-two sizes was added in commit 540b8492618eb for the purpose of having convenient shortcuts for these sizes in cases when the literal number has to be present at compile time, and expressions as '(1 * KiB)' can not be used. One such case is the stringification of sizes. Beyond that, it is convenient to use these shortcuts for all power-of-two sizes, even if they don't have to be literal numbers. Despite its convenience, this table introduced 55 lines of "dumb" code, the purpose and origin of which are obscure without reading the message of the commit which introduced it. This patch fixes that by adding a comment to the code itself with a brief explanation for the reasoning behind this table. This comment includes the short AWK script that generated the table, so that anyone who's interested could make sure that the values in it are correct (otherwise these values look as if they were typed manually). Signed-off-by: Leonid Bloch <lbloch@janustech.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- include/qemu/units.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/include/qemu/units.h b/include/qemu/units.h index XXXXXXX..XXXXXXX 100644 --- a/include/qemu/units.h +++ b/include/qemu/units.h @@ -XXX,XX +XXX,XX @@ #define PiB (INT64_C(1) << 50) #define EiB (INT64_C(1) << 60) +/* + * The following lookup table is intended to be used when a literal string of + * the number of bytes is required (for example if it needs to be stringified). + * It can also be used for generic shortcuts of power-of-two sizes. + * This table is generated using the AWK script below: + * + * BEGIN { + * suffix="KMGTPE"; + * for(i=10; i<64; i++) { + * val=2**i; + * s=substr(suffix, int(i/10), 1); + * n=2**(i%10); + * pad=21-int(log(n)/log(10)); + * printf("#define S_%d%siB %*d\n", n, s, pad, val); + * } + * } + */ + #define S_1KiB 1024 #define S_2KiB 2048 #define S_4KiB 4096 -- 2.19.1